Hi, I did a course at LSHB, north London. Was a VTCT course so it is internationally recognised, this helped me a lot when getting work. They give you free insurance once you qualify as well which was a real bonus for me as I could start working straight away!
http://www.lshb.co.uk Good luck, just make sure you find a proper certified course with good facilities and assistance when you need it e.t.c