No. 4 Group RAF

No. 4 Group RAF
Unit name	No. 4 Group
Dates	1 April 1918 – 24 March 1919, 1 April 1937 – 2 February 1948
Country	United Kingdom
Branch	Royal Air Force
Type	Group
Role	Bomber / Transport
Garrison	Mildenhall, Linton-on-Ouse, Heslington Hall
Notable commanders	Air Chief Marshal Sir Arthur Harris, Air Chief Marshal Sir Ralph Cochrane

No. 4 Group RAF was a significant formation within the Royal Air Force, with two distinct periods of service in the 20th century. Initially established towards the end of the First World War, it was later reactivated on the eve of the Second World War as a key component of RAF Bomber Command. The group played a central role in the strategic bombing campaign against Nazi Germany, operating heavy bombers like the Handley Page Halifax before transitioning to transport duties with RAF Transport Command in the post-war era.

History

The group was first formed on 1 April 1918 within the Royal Flying Corps, shortly before its absorption into the newly independent Royal Air Force. This initial incarnation was short-lived, disbanding in March 1919 following the Armistice of 11 November 1918. It was reformed on 1 April 1937 as part of the RAF's pre-war expansion, headquartered initially at RAF Mildenhall in Suffolk. Under the leadership of notable figures like Arthur Harris, who later commanded RAF Bomber Command, the group was a foundational element of Britain's bomber force as tensions escalated in Europe, moving its headquarters to RAF Linton-on-Ouse in Yorkshire in 1939.

Structure and organization

As a operational group, it controlled several stations and their resident squadrons, which were organized into wings for administrative and tactical control. During the war, its structure evolved to manage the increasing number of squadrons equipped with four-engined heavy bombers. Key subordinate formations included bases like RAF Leconfield, RAF Dishforth, and RAF Marston Moor. The group's headquarters moved to RAF Heslington Hall near York in 1940, providing command for units spread across Yorkshire and Lincolnshire, coordinating operations, training, and logistics through a dedicated staff.

Aircraft operated

Initially equipped with lighter bombers like the Fairey Battle and the Armstrong Whitworth Whitley, the group's aircraft inventory transformed as the war progressed. It became a primary operator of the Handley Page Halifax heavy bomber, with squadrons such as No. 10 Squadron RAF and No. 76 Squadron RAF flying this type on countless night raids. Earlier, it also operated the Vickers Wellington and the Short Stirling. Following its transfer to RAF Transport Command in 1945, the group re-equipped with transport aircraft, including the Douglas Dakota and the Avro York, for trooping and supply missions.

Operational history

Throughout the Second World War, the group was a mainstay of the Bomber Command offensive, participating in all major campaigns including the Battle of the Ruhr and the Battle of Berlin. Its Halifax squadrons undertook hazardous raids on industrial targets in the Ruhr, Hamburg, and Berlin, as well as specialized missions like the Dambusters Raid and attacks on V-weapons sites. The group suffered significant losses during the conflict but made a substantial contribution to the Allied war effort. Post-war, it supported operations like the Berlin Airlift and the Malayan Emergency before its final disbandment in February 1948.

Airfields and bases

The group was predominantly associated with airfields in the north of England, forming part of what was known as the Bomber Command base structure. Major operational stations included RAF Driffield, RAF Pocklington, and RAF Lissett. Other significant bases were RAF Breighton, RAF Holme-on-Spalding-Moor, and RAF Burn. These stations housed the group's frontline squadrons and their maintenance units, with many being expanded with concrete runways and hardened dispersals during the war to accommodate the heavy bomber force.

Commanding officers

The group was led by several distinguished air officers. Its first commander upon reformation in 1937 was Arthur Harris, who later gained fame as "Bomber Harris". He was succeeded in 1939 by Air Vice-Marshal Conrad Collier. Later wartime commanders included Air Vice-Marshal C. R. Carr and Air Vice-Marshal H. A. Constantine. One of its most celebrated commanders was Air Vice-Marshal Ralph Cochrane, who led the group from 1943 to 1945 during the height of the bomber offensive before taking command of No. 5 Group RAF.

Category:Royal Air Force groups Category:Royal Air Force in World War II Category:Military units and formations established in 1918