The squadron lost a further five aircraft (to JG 26) on 28 August, with nine crew killed, and effectively ended operations, withdrawing to RAF Duxford the following day. With these losses, the Defiant—which had been intended from the start as a day and night fighter—was transferred to night operations instead. The type had proven unsuited to the demands of the day fighter when set against the likes of the Bf 109E, and was less capable than other RAF aircraft such as the Hurricane and the Spitfire. By 31 August, over half the delivered Defiants had been shot down by "Luftwaffe" aircraft, a rate that was deemed to be unacceptable.