What you need is access to the classified HIRTA book that details aircraft succeptability and frequency/power. However, most don't and the CAA put WORST case on the charts. The comment on microwave ovens is deadly serious as some HIRTAs won't affect your aircraft but it won't do your soft and reproductive organs much good...
If I recall correctly, Fylingdales is one of those best avoided for the sake of your knackers/ovaries/liver/pamcreas/etc...
LJ