Acting S/L Mieczysław Mümler took joint command of No 302 Squadron RAF with S/L William AJ "Jack" Satchell at RAF Leconfield on 26 July 1940. Detached to RAF Duxford on 16 September, the 40-year-old Pole claimed a Do 215 over the Thames Estuary in Hurricane Mk I WX-J at 17.20hrs on 18 September 1940 before rejoining on 26 September.
Acting F/L Piotr Łaguna was posted to No 302 Squadron RAF at its formation on 26 July 1940 at RAF Leconfield, where he filled in as Polish counterpart of F/L James A Thomson. Both A Flight leaders were attached to RAF Duxford to operate with the Bader Wing, the former on 15 and the latter on 18 September. With their attachment ceasing 7 days later, the 34-year-old pilot became non-effective sick after a patrol on 19 October but succeeded acting S/L Mieczysław Mümler on 31 December.
P/O Julian Kowalski (front) was posted to No 302 Squadron RAF at RAF Leconfield on 26 July 1940, 16 days after the first Polish fighter squadron had been formed. On detachment to operate with the Bader Big Wing at RAF Duxford from 13 September, the 30-year-old Pole flew Hurricane Mk I WX-D, whilst claiming a probable Do 215 southeast of London and a Do 17 damaged over northern London on 15 September, and a Ju 88 over Mildenhall 4 days later before returning on 25 September.
A Polish armourer of No 302 Squadron RAF rearms a Hurricane Mk I at RAF Northolt in 1940. Grouped together in their own squadron, the Poles were known not to be on their best behaviour. "They were a complete law unto themselves," recounted a British fitter stationed at the airfield. "Nobody could control them." Their clannishness and cockiness were said to put backs up and irritate those less concerned with their flying and fighting skills than with having to live and work alongside them.