Some good advice has already been given on here.
Heres my take.
Flying the flexwing,I have great problems in raising Scottish.Tend to stick to Carlisle in and around the Lakes.If its the fast jets your concerned about,you will struggle to get much info unless of course you are in two way with say Warton(South Lakes).Fly high and keep a good lookout.Personally I dont go much below 2000ft.Most of the jet flyers will give you a wing wobble(to indicate theyve seen you) as they pass.Ocasionally they will call up Carlisle as they pass between the city and their zone.If you can sqwawk,even better.Spadeadam are usually watching out if your in the North East of Cumbria.Some of the best flying to be had up here enjoy!!