Hi Dave,
I have just finnished a similar case for a client.
You need to get the original UK document(s) apostilled at the Foreign and Commonweath Office (FCO). We have a firm in London who can get it done in a couple of days.
Then you can get it translated, I find that the sworn translations are often cheaper here in Spain.
With the original documents and the translations you can then go to the Notary and sign an ” Escritura de elevacion a publico de documento judicial”.
NB: this should not be considered a “transaction” and therefore be exempt from transfer tax.
e-mail me if you have any further questions .(JavaScript must be enabled to view this email address)
DUN MARCHING