As far as I am aware, unless it was murder, the statute of limitations has run out in Portugal.
The link I provided suggests much the same in the UK.
If you think someone is going to break ranks and cry murder, then yes we are of differing opinion.
The link refers to magistrates courts which try "summary only" offences. For these cases there is a limitation period of 6 months to get a notification in (not the trial).
No limitation period in the UK, in general, for each way (triable in crown or magistrate court) or indictment offences (crown court only).
A British subject can be tried in Britain for murder committed anywhere in the world.
According to this link there is possible scope to try a foreign national for murder committed abroad:
http://ukpolicelawblog.com/index.php/9-blog/84-murder-abroadThe above does not indicate that a murder has been committed - it is for information.
Correct info to the best of my knowledge.