I agree with everything you have said the lines need repainting BADLY! and the dome roundabout can be difficult but when you know the area it isn't too bad but if you don't then you really need to focus! Even people who know the area get it confused sometimes!!! but the road markings desperately need repainting - it made learning so hard especially that junction by the test centre!
i'm little confused as to why garston (the exist you took) is the 4th exit, but when counting you only pass north watford and aylesbury, so surely it is the 3rd exit?
Damn! I’m sorry to hear that but 3 minors is good. You WILL get it next time. Keep up the practise. Don’t drop your level and you’ll smash it next time!