Many thanks for the replies: We like places with history but probably just want to kick back and relax a bit - so some warmth and a bit of sun/sea would be just the ticket.
First thoughts are that we drive down from Santander to the mediterranean coast, avoiding Almeria/Roquetas at all costs - was friends with someone who kept a boat there, and must say I didn't like it at all. ( very subjective - I'm sure it has it's good points)
We could take ourselves over to the Algarve - we need a fairly easy journey back - obviously taking two or three days- stopping at Aires on the way there and back- say three days down/two back.
Will certainly check back as you suggest