The British Bayonet: A History from Plug to Sword to SA80

Introduction

The bayonet has been an integral part of the British soldier’s equipment for over three centuries — from the plug bayonets of the late 17th century to the socket bayonets of the Napoleonic Wars, the sword bayonets of the Victorian era, the cruciform spike of two world wars, and the modern knife bayonet still issued today. No other weapon bridges so many periods of military history or tells so rich a story of tactical evolution, industrial development, and combat experience. For collectors, the bayonet offers extraordinary variety, accessible prices, and a depth of research potential unmatched by almost any other category of militaria. [1]

The Plug Bayonet: 1660–1700

The earliest bayonet was the plug bayonet — a single-edged blade with a tapered wooden or bone handle designed to be pushed directly into the musket barrel. The name derives from the French city of Bayonne, where such weapons are traditionally said to have originated in the 1640s, though the precise origins are debated. [2]

The plug bayonet’s fatal deficiency was obvious: once fixed, the musket could not be fired. British troops at the Battle of Killiecrankie in 1689 were overrun by Highland Jacobites while attempting to fix their plug bayonets — a disaster that accelerated the search for an alternative design.

Genuine plug bayonets from the British Army are exceptionally rare. The few surviving examples are found in museum collections. Any plug bayonet offered commercially should be treated with extreme caution, as many later hunting swords and daggers have been mislabelled as military plug bayonets.

The Socket Bayonet: 1700–1853

The socket bayonet solved the plug bayonet’s fundamental problem: a tubular socket slipped over the muzzle, held in place by a zig-zag slot engaging a lug on the barrel, leaving the bore clear to load and fire. The socket bayonet was adopted by the British Army around 1700 and remained the standard pattern for over 150 years. [1]

Key Patterns

• Land Pattern (Brown Bess): The classic triangular-section blade, approximately 17 inches long, fitted to the Long Land Pattern musket and its successors. Millions were produced between 1720 and 1840. The blade was designed for thrusting only — the triangular cross-section created a wound that was extremely difficult to close, a grim advantage in close combat.
• India Pattern: Shortened blade (approximately 15 inches), lighter socket, fitted to the India Pattern Brown Bess. This was the pattern carried at Waterloo.
• Baker Rifle Sword Bayonet: The Baker rifle, issued to riflemen and light infantry from 1800, used a distinctive brass-hilted sword bayonet with a 23-inch blade. This was the first British military bayonet designed for both cutting and thrusting, and is one of the most sought-after Napoleonic-era items. [2]

Collecting Socket Bayonets

Socket bayonets are among the most affordable pieces of genuine 18th and 19th-century militaria. British Land Pattern bayonets can be found for £100–£300 depending on condition and markings. The key to identification is the socket: look for broad arrow marks, regimental rack numbers, and inspector stamps. Ground-dug examples (from battlefield recoveries) are common but of lower value than arsenal-condition pieces.

The Sword Bayonet: 1837–1903

As rifles replaced smoothbore muskets in the mid-19th century, bayonet design underwent a revolution. The sword bayonet — a full-length blade with a handle incorporating a locking mechanism — gave the soldier a weapon that could function both as a bayonet when fixed and as a short sword or large fighting knife when detached. [1]

Key Patterns

The Yataghan Bayonet

The yataghan-style sword bayonet — with its distinctive S-curved blade inspired by Ottoman weapons — is one of the most elegant military edged weapons ever produced. British versions were made for the Short Enfield rifles and naval rifles in the 1850s and 1860s. They are highly prized by collectors, with good examples of the Pattern 1856 selling for £300–£600. [2]

The Twentieth Century: 1907–Present

Pattern 1907 Bayonet

The Pattern 1907 was the iconic British bayonet of the First World War. Designed for the SMLE (Short Magazine Lee-Enfield), it had a 17-inch single-edged blade — long enough to give the shorter SMLE the same reach as the longer German Gewehr 98 with its Seitengewehr 98/05. The 1907 bayonet saw service on every front of the Great War and was produced in enormous quantities by Wilkinson, Sanderson, Chapman, Vickers, and others. [1]

The 1907 pattern exists in several variants:

• Mk I (1907): Hooked quillon guard, oilhole in pommel
• Mk I (modified) (1913): Quillon removed (found to snag on equipment)
• Mk II: Minor production changes
• Mk III (1916): Simplified wartime production, shorter fuller

The hooked-quillon 1907 Mk I is the most collectible variant, commanding a significant premium over the later marks.

No.4 Mk II (Spike) Bayonet

The most controversial British bayonet: a simple cruciform spike (eight inches long) with no blade, no edge, and no utility beyond the purely military function of stabbing. Designed for the No.4 rifle, the spike bayonet was adopted in 1939 and served throughout the Second World War and into the 1960s. Soldiers universally loathed it as useless for any practical purpose (you couldn’t cut wire, open tins, or chop wood with it), and many carried privately purchased knives to compensate. [2]

There were two principal variations:

• No.4 Mk I: Socket type with a flat blade cross-section
• No.4 Mk II: The definitive spike bayonet, cruciform cross-section, tubular socket

Despite their unpopularity with soldiers, spike bayonets are among the most affordable WWII collectibles (£20–£50 for a good example with scabbard) and serve as excellent entry points for new collectors.

SLR (L1A1) Bayonet

When the British Army adopted the L1A1 Self-Loading Rifle (the British version of the FN FAL) in 1957, it was paired with a knife bayonet with a 7.5-inch blade. This was the first British military bayonet with genuine utility as a knife — it could cut, chop, and serve as a tool. Variants included the standard issue and the rare “shortened” version used by some units. [1]

SA80 Bayonet

The current-issue British bayonet is the L3A1, a wire-cutter type bayonet designed to fit the SA80 (L85) rifle. It was introduced in 1985 and features a 7-inch blade with a wire-cutting notch in the spine that works in conjunction with the scabbard. The SA80 bayonet has seen active service in the Falklands (predecessor pattern), Iraq, and Afghanistan — including the famous bayonet charge by the Argyll and Sutherland Highlanders at the Battle of Danny Boy in 2004. [2]

Bayonet Tactics Through History

The tactical role of the bayonet evolved dramatically over three centuries:

• 18th century: The bayonet was the primary close-combat weapon. Infantry fought in close-order lines, and the bayonet charge — delivered with a huzzah — was the decisive tactical moment of battle. At Fontenoy (1745) and Quebec (1759), British bayonet charges decided the day.
• Napoleonic Wars: The bayonet remained central to infantry tactics, but studies showed that bayonet wounds accounted for a surprisingly small percentage of casualties. The threat of the bayonet — the charge itself — was the decisive factor, causing the enemy to break and flee before contact.
• Crimean and Colonial Wars: Bayonet charges remained an important element, particularly in colonial warfare against opponents lacking firearms. The defence of Rorke’s Drift (1879) featured extensive hand-to-hand bayonet fighting.
• World War I: Despite its terrifying reputation, the bayonet accounted for less than 1% of casualties. Trench warfare favoured clubs, grenades, and entrenching tools over the long 1907 pattern bayonet. Nevertheless, bayonet training remained central to military doctrine as “the spirit of the bayonet” — aggressive offensive spirit — was considered essential to morale.
• World War II to present: The bayonet’s role has been almost entirely psychological. Its practical use in combat has been extremely rare, though instances do occur. The British Army continues to train bayonet fighting and considers the bayonet charge a valid tactical option in specific circumstances. [1]

Collecting British Bayonets

Why Collect Bayonets?

Bayonets offer several advantages as a collecting field:

• Variety: Hundreds of patterns, marks, and variations spanning 300+ years
• Affordability: Many excellent examples available for £20–£200
• Displayability: Bayonets display well and require minimal space
• Research depth: Maker marks, inspection stamps, unit markings, and dates provide extensive research opportunities
• Legal status: In the UK, bayonets (as non-firearms) are generally legal to own, buy, and sell without restriction, though carrying them in public is subject to bladed article laws

Price Guide

Key References

• British and Commonwealth Bayonets by Ian Skennerton — the definitive reference for identification
• The British Bayonet by Bill Harriman — accessible overview with good illustrations
• Rebayoneting: Bayonets of the World by Christian Mezey — online database with extensive coverage

From the muddy fields of Killiecrankie to the deserts of Helmand Province, the British bayonet has been carried into action for over 300 years. It is a weapon of profound historical significance — and a collecting field of extraordinary breadth and accessibility. [2]

Bayonet Tactics Through the Ages

The history of bayonet design cannot be separated from the evolution of bayonet tactics. Changes in the weapon reflect changes in how soldiers were expected to fight — and the British Army’s approach to close combat evolved dramatically across three centuries. [1]

The Bayonet in Linear Warfare (1700–1815)

In the age of the smooth-bore musket, the bayonet was the decisive close-combat weapon. Battles were settled by the “push of pike” — or, after the bayonet replaced the pike, by the charge of disciplined infantry with fixed bayonets. The British Army’s tactical system relied on a devastating close-range volley followed immediately by a bayonet charge. The theory, repeatedly confirmed in practice, was that an enemy who had just received a shattering volley at 50 yards would not stand against a line of levelled bayonets. [1]

At the Battle of Minden (1759), British infantry advanced unsupported across open ground against French cavalry and artillery, delivering volley fire and then charging with the bayonet — driving the French cavalry from the field in one of the most extraordinary feats of infantry combat in history. At Waterloo (1815), the bayonet remained central to the defence of the ridge, where British infantry formed square against French cavalry charges and then counter-attacked with the bayonet against infantry columns. [1]

The Bayonet in Colonial Warfare (1815–1900)

In the colonial campaigns of the Victorian era, the bayonet retained enormous psychological importance. Against opponents who fought at close quarters with bladed weapons — Zulu warriors with iklwa stabbing spears, Mahdist Ansar with swords and spears, Pashtun tribesmen with tulwar swords and khyber knives — the bayonet was the soldier’s means of close-quarters survival. [2]

The defence of Rorke’s Drift (1879) remains the most famous example: the small garrison fought off repeated Zulu attacks at point-blank range, the bayonet being the primary weapon in the hand-to-hand fighting across the barricades. The socket bayonet of the period was being replaced by the sword bayonet at this time, and the Martini-Henry’s Pattern 1876 socket bayonet — a relatively short spike — was criticised as inadequate against the longer reach of Zulu spears. This experience was one of the factors driving the adoption of longer sword bayonets. [2]

The Bayonet in the Trenches (1914–1918)

The First World War produced an extraordinary paradox: the bayonet became simultaneously more feared and less used than at any previous point in history. Statistics from the war show that bayonet wounds accounted for less than 1% of casualties — yet bayonet training received more emphasis than ever before, and the bayonet charge remained the culmination of every infantry attack. [2]

The explanation lies in the psychology of combat. The purpose of the bayonet was not, primarily, to inflict casualties — it was to terrify the enemy into surrendering or fleeing. A line of men charging across no-man’s-land with levelled bayonets presented a terrifying spectacle, and academic studies of combat psychology confirm that most defenders would break and flee (or surrender) before actual close contact was made. The bayonet’s value was morale — it gave the attacking soldier confidence and terrorised the defender. [2]

In the rare instances when bayonet fighting did occur in the trenches, the standard infantry bayonet was often found to be too long for use in the confined space of a trench. Soldiers quickly adapted: shortened or “broken” bayonets, entrenching tools, clubs, knuckle-dusters, and improvised weapons all saw use. The specialist trench raiding parties that developed from 1915 onward typically armed themselves with revolvers, grenades, and short cutting weapons rather than bayonets. [2]

Identification Guide: Key Markings and Stamps

Correctly identifying a British bayonet requires careful examination of several features. The principal markings found on British bayonets include:

• Manufacturer’s marks: Stamped on the blade or ricasso. Major manufacturers include Wilkinson Sword (crossed swords mark), Robert Mole & Sons of Birmingham (MOLE mark), Thomas Turner of Sheffield, and the government factories at Enfield and Woolwich.
• Date marks: Many bayonets bear a date stamp — either the year of manufacture or the date of inspection. Crown over date and inspector’s initials are typical government inspection marks.
• Broad arrow: The WD (War Department) broad arrow mark, used to indicate government property. Present on virtually all British military bayonets. The broad arrow may be “sold out of service” cancelled by a second broad arrow crossing the first (forming a double arrow or “broad pheon”).
• Unit marks: Many bayonets bear unit stamps — typically the regiment or battalion number. These were applied at unit level and can be extremely useful for provenance research, particularly when combined with documentation or medal groups.
• Steel grade marks: Particularly on later patterns, the type of steel may be indicated. This is primarily useful for distinguishing between wartime emergency production (sometimes using lower-grade steel) and proper peacetime specifications.
• Foreign-issue marks: British bayonets issued to allies, colonial forces, or exported commercially may bear additional markings including foreign-language acceptance stamps, national proofmarks, or import marks.

Care and Display of Bayonet Collections

Bayonets present specific conservation challenges that differ from other edged weapons. The combination of a steel blade and — in many patterns — wooden, leather, or composition grips creates a multi-material object that requires balanced care. [3]

The blade should be kept clean and lightly oiled. Renaissance Wax (microcrystalline wax) provides excellent long-term protection without the need for repeated oiling. Never sharpen a collectible bayonet — the grinding marks are irreversible and destroy originality. If surface rust is present, remove it mechanically with fine bronze wool (never steel wool) and apply Renaissance Wax to stabilise. [3]

Wooden grips — particularly the walnut grips found on Victorian and Edwardian patterns — can dry out and crack in centrally heated rooms. An annual application of museum-grade conservation wax (such as Belsaw or Renaissance Wax) helps maintain the wood. Leather grips and scabbards benefit from conservation-grade leather dressing applied sparingly once or twice a year. [3]

For display, bayonets are traditionally mounted horizontally on felt-covered boards, held in place by padded brass clips or Perspex brackets. Ensure that the display environment is dry and that temperature fluctuations are minimised. Direct sunlight will fade leather scabbards and discolour wooden grips. A good display layout groups bayonets chronologically or by type, with clear labels identifying the pattern, date, and any known provenance. [3]