Geoff and Pat...
Sticky situation that ...and complicated...according to the NHS if you spend more than one month away from your UK residence you should de-register from your UK Doctors...
As a pensioner receiving a UK State Pension you can ask the Pensions people in Newcastle to issue a Form S1.
(Overseas Healthcare Team (Newcastle) +44 191 218 1999)
This form entitles you to reciprocal health care in Spain. When completed you should present this form to to your local INSS office in Spain, however once you are registered for health care here you are excluded from the NHS in the UK. The other forms you have to present to the INSS office include the Certificado de Residencia / NIE no. and Padron registration. And therein lies the rub...
The Certificado de Residencia also implies full time residence in Spain... so no access to UK NHS treatment when you are in the UK.
For someone spending more than a month but less than 183 days in Spain, whilst retaining a UK address, the best solution is simply 'keep shtum'... use your EHIC Cards if you need to whilst over here and for pete's sake make sure they are valid during the period of your visits...
Spain no longer issues EHIC cards to non-Spanish residents; If you do go ahead and register in Spain you can use your UK issued EHIC card to gain temporary access to the NHS...
And yes you will have to pay for any prescriptions...
Hope this helps a little.
This message was last edited by foxbat on 20/04/2012.