Navaids in East Anglia?
As someone has pointed out, quite a few airfields have been built there, and for the record an extended circuit around Cambridge will take you over Waterbeach, Oakington, Bourn, Bassingbourne, Duxford, mebbe even Six Mile Bottom.
To give you an idea of distance most of these airfields were accessible from Cambridge to a youngster on a bicycle for "Battle of Britain" open days.
Heaven forbid if VFE went flying in South Africa, my PPL Navex lasting 2 hours 40 minutes, went over 3 towns, because in 2 hours 40 minutes that's all we could find. For the South African brigade the route was Cradock - Colesburg - De Aar - Cradock.
There were no such things as Navaids, and there probably aren't now, but as long as you recognised "Compassberg" and "Martha and Mary" you were pretty safe in the Cape Province.