My passport expires soon and has 5 months valid on it I'm going to Spain and have three weeks until I travel.
Would they let me in with my passport and back home or should I risk the two week renewal and hope the passport people send my passport in time for my holiday
Mine came well within the two weeks- infact it took less than a week. Get down to the PO and they do the checks for you- saves the worry of something being wrong with your application. Make sure your hair is not covering eyebrows as they can be fussy and not accept the photo. I would get it all done and away tomorrow though.
You won't have any problems entering Spain or returning to the UK with just 5months left on your passport, it's whether the airline or tour company you are travelling with has it's own rules, often they set a six month validity period.