I've heard UK driving test examiners can be pretty strict so I was actually a bit nervous, even though I've already done this all once in Canada. You see: roads are a lot smaller in the UK, I've hardly driven over the past 6 years, and my sister taught me how to drive manual (oh yeah: and the car never made it back from Alaska, but I swear it wasn't my fault!). At any rate, the chap who did my test in Morden was quite fair, and was actually quite friendly. I had a few minor faults, which he went over afterwards and gave me a couple of good tips. It was actually a pleasant experience all in all.
I also decided to get an instructor, and in retrospect, I'm glad I did - I'm actually sure I would've failed if I hadn't. I ended up going for
BSM in the end, and lucked out with a guy named Phil Hinds. If you live in South London and are learning to drive, he's got my recommendation.