schrodingers cat:
I lived in Spain between 2000 and 2008 and the number of Brits I met out there who run UK cars with no tax mot or insurance was disgusting
I couldn’t agree more, makes my blood boil the amount of brits driving around thinking they are getting away with it 
what happens if one of these smug idiots runs into my mrs or even worse knocks my little girl over? with no MOT or tax their insurance is invalid.
you have 183 days to register the vehicle onto spanish plates or they will confiscate the car, they regularly park outside the schools on the 1st day of term and make a note of the number plates on mummys 4x4 then return on the last day before the summer holidays with the list of number plates and if you can’t prove the car has left spain then bye bye mummys 4x4.
and before anyone mentions roadtax we pay it in spain as well but it goes to the local town hall so at least you know which politicians are squandering it 