 The raiders (nearly 40 mixed ground attack aircraft with fighter escort) slipped through and spent five minutes over the target, bombing and Strafing, while the HAA gun detachment got off five rounds of Shrapnel shell, which was all they had to use against low-level attack.The raiders then got away without loss, despite being engaged by the Harwich AA guns while withdrawing.The equivalent of seven Fighter Command squadrons had been ordered to intercept, but only a few reached Martlesham as the attackers were leaving.