mckellar took over from squadron leader churchill on the 11 september. he achieved a further three victories 15 september. the raids were made in large formation leading the fighting that day to be christened the battle of britain day. mckellar led 605 into combat twice on that date claiming two bf 109s and a do 17. that night, at an hour past midnight, 16 september, he claimed another he 111 shot down. a medal bar to the dfc followed which cited his "excellent fighting spirit ... particularly brilliant tactician, and his led his squadron with skill and resource".