Oi you prick I already answered this. Bourton on the water is a decent day out, even has an animal park/zoo there. Theres a tea room there that I can't remember thats on the tele, I ate there and remember it being nice.
Interesting fact for you to whip out, the houses in the towns and villages around the Cotswolds and outside near Oxfordshire are all made from Cotswold stone, you'll know what I mean when you drive through as every fucker is made from them.