Dont forget the set of spare light bulbs, warning triangle, hi viz jacket in the driving compartment with you ( so you can put it on before you get out of the vehicle ) 2 spare tyres !!!!!!! as you are not allowed to travel with out one, so if you get a puncture and change it for the spare ( you then don't have a spare tyre ) you are then suppose to drive to a tyre garage and get the punctured tyre fixed before continuing on your journey.
A friend of mine has had this happen to him at the ferry port on the homeward journey, he got a routine customs stop, when the customs official asked to look in the back of his camper he saw the punctured tyre and called the police over who fined him for not having a spare tyre, had to give name and all details this then flagged up several parking offenses too.