The Cotswolds is massive - anywhere between Bristol, Banbury, Cheltenham, Cirencester & Oxford. So it depends where you mean. NE Bristol probably has the best if it’s not too far for you
I’m based near Cirencester but willing to travel
Padel4All Swindon is decent, and Padel Shift has great coaches. For great indoor facilities it might be worth heading into Bristol for Surge Padel or Rocket Padel