I think you'd better do it on your own and spare yourself the effort and money. I went to London Met myself, but then only to do my exams every few months, not the ground school. That worked quite well (always scored above 90%). Make sure you've got the Confuser and you should be fine. As for the flight computer/Pooley, Oxford has a good DVD covering it.
In my opinion it's better to save this money and invest it in any possible ATPL studies later on instead.