Definitely try Angela first. I had been with another instructor who was always unreliable always giving negative feedback. I never felt comfortable with him. Angela on the other hand was so reassuring and even when doing mistakes would always explain what was the problem and would come up with alternatives.
Established school with 28yrs experience, choice of male or female instructor & 90% PASS RATE! With a grade "A" in the DVSA Instructor Test(only 17% of all UK instructors achieve this)