Can't help you with the south of England.
Just one question.
Would YOU fly with an instructor who got his/her rating super quick?
Here in Australia, I usually spend 8 weeks on it with 2 trainees. At the end of it you feel like you hat a frontal lobotomy.
50 hours of flying, around a 100 in the classroom and countless hours researching. You should not just 'regurgitate' some one else's briefing. You should be 'selling' YOUR briefing to your student. That takes time. Go slowly and you live longer and enjoy it more.