I took tons of lessons because I didn't know how to drive a manual and the waiting list for lessons on an automatic was very long (and they were more expensive). But I did end up passing on the first try! At the end, the examiner looked at me and was like, "So how long have you been driving?" When I told him over 15 years, he said, "It shows!" My husband is an expert manual driver (and has been renting cars here on his US license for 2 years with no problems, even through work) will just be taking a few lessons to learn the rules of the test.
I've said it before and I'll say it again, the British really know how to take all the fun out of driving.