Why not try and come to the PFA rally called Flying For Fun. Its 19-21 Aug at Kemble.
Lots of other homebuilt aircraft and like minded souls.
I would also suggest The imperial war museum at Duxford airfield. The flying days are great but very busy. Otherwise its an interesting museum with occasional interesting aircraft in the pattern.
Cambridge is a short bus ride (10km) and is worth spending a day or two looking round while you leave the aircraft at Duxford.
The Shuttleworth collection
is at Old Warden and has an evening air display on 19th Aug which would fit in well with other events. The collection of aircraft go back 90 years and it is spectacular to watch the oldest ones perform on a still summer evening. You do need to book if you want to fly in as numbers are restricted.
I do agree about visiting either Alderney or Guernsey in the Channel Islands on your way here or back. Both are very aviation friendly with airport car hire at 20 Euros per day and very cheap Avgas. They are both very beautiful islands with superb beach and cliff walks.
These are some suggestions. Let us know what things you like to do other than flying and I'm sure more suggestions will come flying back.
LKI Chief grasscutter (retired).
If everything's under control, you're going too slow.... Mario Andretti