the Spanish instructor had no idea what he was saying,
IMHO if you can't understand acsent's, then my advise to you is , find something else to do. You will receive info from atc and have to listen to other pilots in the air on a daily basis and not everybody speak's english like a Brit. If you act like this because of something as silly as a trail lesson ,my GOD what are you going to be like when you do your IR.
HappyFran is right BCFT is a good school and Old sarum in Salisbury has a good reputation aswell.