jibjab, im from neath in south wales, and moved to london 20 months ago, i work as an autocad / architectural technician, and have done so for 11 years, moving to london was the best move i have ever made, im not too far away from my family and have made loads of new friends up here. the rate of pay you would be able to command would be similar to that of my line of work - �20 - �30 per hour. people say its really expensive up here, but its not so bad, rent / house prices are through the roof but, sharing a house is much cheaper and a start to meeting new people. the girls will love your accent and is a great ice-breaker. haha
good luck