For SGUL - it doesn't matter if you have a 2.2 or a 2.1. That's the requirement and it's the GAMSAT result that decides if you get an interview or not. Degree result isn't considered any further.
Nottingham ask for 5 points higher on the GAMSAT if you have a 2.2 but again that's how far they take it.
The main problem is that you can only apply for 2 graduate courses with a 2.2 unless you can afford a 5 year course.