05/05/2014 at 9:45 am #74591
generally the best way is to get a referral. where in the UK are you? it may be possible to ask around and see who is available.
otherwise, it can be hard on your own to pick one. I would hate to give you a list of certifications in certain techniques that I am in favor of because that is not a guarantee that someone is good. but it may come to that.