Hello Pete and welcome to the forum. You will need a brake controller for the electric brakes such as one of these
http://www.campingworld.com/search/i...ake+controller Most newer vehicles are prewired so all you have to do is mount the brake controller and plug it into the appropriate port near the fuse box.
Justliz is from the UK, perhaps she could assist you where to purchase one.
Good Luck.....Tim