The 'skyhook' was the informal squadron emblem, whereas the winged horse's head was the official squadron badge:
http://www.raf.mod.uk/bombercommand/.../35sqncrst.gif
Scampton's finest Vulcan squadron disbanded on 28 February 1982. Knowing that the only Vulcan bombing threat they could possibly then face was posed merely by the inferior Waddington mob, Argentina knew it was therefore safe to invade the Islas Malvinas a few weeks later.....
