Thanks Evo - but this lists "Winfield" which is up North (near Berwick-Upon-Tweed). However it will be a useful reference anyway and I could try for Wing Farm (near Warminster) instead if Wingfield is not an option.
Keevil would also be ideal but I haven't seen this listed in Pooleys or AFE. The half-mil VFR chart shows that Keevil is used for para-dropping and gliding and to stay well clear - does anyone know if it's therefore completely off limits to GA aircraft?