Currently 72 credits for month of ClassPass. This will get you approx 10-20 classes (many studios offer half price for your first class). Try yoga, Pilates, spin, pole dance and much more!
Sign up to a cash ISA or LISA and receive ยฃ15-ยฃ250 (random but ยฃ15 is the minimum you can get). They have the best rates on the market and really good customer service in my experience.