When something is due it's first MOT, is there any specific period of time around the 3 year mark that it must be done? Exactly the third anniversary of first registration, or doesn't it matter that much as long as you don't use it on the road? Likewise, a vehicle that's already had MOTs, if you couldn't get it to an MOT during the month it's due, does it matter if it's late? Again as long as it's not used on the road? It looks like I'm going to be in the US when one of my cars and the bike are due their MOTs next month, so trying to work out if I can just leave them till July.