My best advice is to ring the UK agent and get the number of the official Portugese agent for your make of raft. I didn't do that last year and even though my raft has a 3 yr recert period, the local agent I used, returned it with only a 1 year cert. saying it was not possible to give a 3 yr cert in Portugal. (this is not true as I've since spoken to the Portugese agent).Prior to him taking it I insisted on the 3 yr cert and he agreed, only to bring it back with one year. I now need it doing again this year but will not be using him again. Can't give you his name right now as all the details are on the boat but just beware if you've a "3 year" raft.
Dave