You ( or now me ! ) are opening a hornets nest. There are several views on this and all from experts (including paid professionals as well, as all of us here !!! )
The problem I believe comes down to interpretation of the law, in particular the phrase, 'the vehicle must be legal in UK for it to be used in Spain'
The question which then arises is, whether that means having a valid Road Tax (Vehicle Excise Licence in UK). My interpretation has always been (and support by various experts over my 23 years here, but not by all !) that it means the vehicle must be roadworthy. The Road Tax refers to a vehicle being used on a road maintained at public expense on UK, thus as it is not in UK that cannot apply. Others will I know say I am wrong, as well I may be.
As for insurance. A UK registered vehicle can be insured in Spain just the same as in UK, 12 months, full comp etc. An MOT equally id not required in Spain, but if toy have an ITV (The Spanish equivalent to an MOT) then I am told by several insurance brokers that if you suffer a write off they will pay market value, without the cert., its trade value.
Of course if you register as living in Spain, must be done after 3 months permanently here, then you cannot drive a foreign registered vehicle. (Going to say Gibraltar for the day MAY be construed as leaving, in which case the three months would start again) If you are not registered as living here, you or your family can drive a foreign registered vehicle for up to a total of 6 months in any 12 months
As for the SWORN. I would think the DVLA would be the best ones to advise you..
This message was last edited by johnzx on 03/08/2011.