This is 90 Squadron's XD826 at Honington, 1960-61. It was formerly with 7 Squadron. The bomb is the casing of a Blue Danube thought to about to be dumped (the graffiti reads 'Uncle Bunkle's Bomb'. Ted Bunkhall was 90 Squadron's Flight Commander at the time and a former next door neighbour when I lived at Honington).
There appears to be an aerial under the tail cone. There is a photo in Eric Morgan's Valiant book (page 125) of XD816 in 1968 with this antenna, and another of XD823 (page 79). In the chapter on our nuclear deterrant there are some drawings (page 75 and 76) of the modified XD818 also with it.
Does anyone have any idea what it might be?
