I'm on the conversion course at westminster at the moment. It's great. There's some excellent teaching and the course is well regarded. Just to make you aware though , it's one of the more condensed courses. A lot of conversions take 18 months and you do the whole thing in a year here so it's incredibly intense, you have to be prepared to work very hard! The sign of a good conversion course is that you have to do a dissertation which is worth more than one module and you do at westminster, so I would recommend it as an option. Good luck!