personally mate, as i say (from experience) you can second guess a lot of things which could become expensive. Vagcom is very useful, if you put a
help wanted thread in the vagcom section i'm sure there will be someone near'ish you in London that woud be willing to log it to
help out a fellow member
. If you get any errors on there your insure of, put them up and someone will
help. Sorry, i know that isn't the most helpful post but just trying to save your money