also gladiator piloted by K.C.Vickery,

Actually Sgt KENNETH PRIMROSE VICKERY of 263 Sqn 07/04/1940 in Gloster Gladiator N5623
Which lost Control lost in low cloud during formation flight;

The aircraft dived into the sea off Portishead, Somerset.

http://www.cwgc.org/search/casualty_details.aspx?casualty=1809327