On 7 October 1940, Squadron Leader Archie McKellar of No. 605 Squadron was credited with five Messerschmitt Bf 109 victories during the Battle of Britain. Flying a Hawker Hurricane, he claimed four German fighters in an early-afternoon engagement and a fifth later that day. The five credits placed him among the small number of fighter pilots recognised as an ‘ace in a day’.
McKellar was already an experienced ace. The distinction described the concentration of five credited victories within a single day, adding an exceptional episode to a combat record built during the preceding months. His achievement came as the air fighting over southern England entered a changing phase.
Hurricanes over south-east England
By October, 605 Squadron was operating from Croydon within No. 11 Group, the Fighter Command formation responsible for the defence of south-east England. Its Hurricanes continued to meet German aircraft over the approaches to London and across Kent and Sussex.
The Battle of Britain had reached its conventionally defined final phase. The Luftwaffe was placing greater emphasis on night bombing, while its daylight operations increasingly involved fighters and fighter-bombers. Fighter sweeps and interceptions continued to produce sharp engagements above the same counties that had borne much of the summer’s fighting.
McKellar’s opponents on 7 October were Bf 109s. His claims therefore belonged to this continuing fighter battle. For the Hurricane pilots defending the region, October still brought encounters with German single-seat fighters, even as the pattern of the wider offensive shifted.
Five credited victories across the afternoon
The first four claims arose from fighting across Kent in the early afternoon. McKellar engaged German fighters in a succession of attacks, accumulating the greater part of his day’s credited total during this period. A further engagement later in the afternoon produced his fifth Bf 109 claim.
The sequence is important to the character of the achievement: the five credits were accumulated through more than one engagement. Returning to combat later in the day extended an already unusually successful afternoon and brought his credited total for 7 October to five.
These victories belong to the RAF’s wartime combat-claims record. Victory claims were assessed from pilots’ combat reports and the evidence available immediately after fast-moving engagements. Across the Battle of Britain, the totals claimed by Fighter Command exceeded the Luftwaffe losses subsequently established. McKellar’s five credited victories retain their place in his service record, while individual matches to German aircraft losses remain uncertain.
An Auxiliary pilot’s combat experience
McKellar’s route to squadron command began in Scotland. He had served with No. 602 Squadron of the Auxiliary Air Force before joining 605 Squadron. His experience linked the pre-war part-time flying organisation with the demands placed on Fighter Command during 1940.
He had already claimed three Heinkel He 111 bombers during the attack on Tyneside on 15 August. Further successes followed after 605 Squadron moved south, adding to a combat record already established before the fighting of 7 October. On 7 October, that accumulated experience formed the background to his five fighter claims.
McKellar was killed in combat on 1 November 1940, immediately after the official closing date of the Battle of Britain. His short wartime career encompassed both the defence of northern Britain and the sustained fighting in the south-east. The five victories credited on 7 October stand as its most concentrated success, rooted in the Hurricane operations of 605 Squadron during the campaign’s final weeks.