See http://www.thisislincolnshire.co.uk/Gna ... story.html for a clear picture...
or http://i367.photobucket.com/albums/oo11 ... 280612.jpg ,
taken from
http://forums.airshows.co.uk/viewtopic.php?f=8&t=44377
http://www.airplane-pictures.net/photo/ ... -gnat-t-1/ , it's G-RORI.