The address your vehicle is registered at does not come into it, as long as you are on your way to a pre-booked MOT Test – that is when you are in the UK – however, if you are stopped before you get to the UK, or if you have an accident, you will be subject to the local laws.
You will need to find out the relevant laws in the countries you will be travelling through – outside the scope of this forum, and I suspect, VOSA, unfortunately.
You could of course have had your car MOTd just before you left and had a whole year to get back (for the benefit of others who this might apply to).
