My pport expires in May. Can I go on holiday and return OK for a trip end of March/Beg April?

as long as you are back b4 the expiry date you can travel....however better safe than sorry who knows you might get stuck so if i was in your place i would renew it and it seems you have the time to do it so why not and just to confuse you a bit more there are embies everywhere and they can renew you pport if you get stuck.....