Thanks for all your comments. Now wondering wether to look at a small horsebox instead. Any advice or comments appreciated. P.S where is the spell checker????
I would def go small lorry and runaround - if you look at http://www.atacanter.co.uk they have small two horse boxes - I've used them before and can comfortably fit a mare and foal or a 16.3hh warmblood on board. Just watch the load weights of them (and your horses).