Steve Cox is Andrew's head pro and is a top guy and cheaper than Andrew. Give him a call and tell him Martin Bedborough sent you (might knock a couple of quid off as HID works at Sand Martins)
I have been using a guy called Grant Sayer for the last three years. He's based out of Maidenhead Golf Club and is an excellent teacher who got me back down from 18-11 in the course of a season. I've only stopped using him because I get the discount at Sand Martins but will go back if ever Steve is fully booked and I need a quick fix.
The other guy I'd recommend in Paul Harrison who works for N1Golf out of Maidenhead Golf Centre. He is a bit pricy at £50 per hour but you are getting a top notch coach