Sometimes it can be good to do preparation (brushup) away from home, fewer distractions than if you have your friends calling you to come out for a drink every night
Keep in mind that London Met is an academic institution so focussed around the academic year. My exams would have been across two academic years and they couldn't be sure what courses would be offered in the next academic year. I was concerned I'd get halfway through and their funding or focus would change and ATPLs would be cancelled. It's one factor to consider.