Thinking 15 days in early May for our trip to England. Want to include Cotswolds, Cornwall and London. We want charm and views or gardens with b and b in Cotswolds. Should we go to London in beginning or at end? Should we rent car from airport and head to countryside and stay 3-4 nights in Cotswolds (any suggestions what b and b for under $100 nite??) (any car rental tips from Airport??) and then head for Cornwall? We will probably splurge and stay at Tresanton Hotel for one or two nights while exploring and another night elsewhere on coast before heading for London for 5 nights. Any wonderful hotel for under $150. nite?? Thank you for any help.