hi. In the Mora area, the police are now taking photos of any English reg car on the road. They then checking by internet  with the DVLA to see if it is taxes. If it is not, they are stopping the car at the roadside, or entering fincas to check on cars, and the owner is then given 6 days to get it on to Spanish plates.. Otherwise, the car must not be moved, unless on a low loader.. They really do mean business, and i know a few people that this has happened to.