From my experience of 2 years ago.
First you have to send over your logbook and licence to get a personal "Letter of requirements".Takes about 3 weeks and you can't work without a licence.
This letter is most important as it refers only to you and will have a time limit after which all bets are off.
Next you will have to tackle the exams.Fortunately I only had to do 2 and flew over to the UK (Gatwick) sat them on the next day and flew straight back.
Having obtained passses you can book a Medical ( cost me 270 stg) and licence test with a CAA observer( 1000stg + I think).You must also provide an aircraft or Sim,a TRE ( examiner) and any other extra crew required.
I flew over again (Crawley)for the skills test and did the Medical ,at Gatwick ,the day before the test.It was a bit risky as you must have a valid Medical to do the test.I got it a couple of hours before the test was scheduled.
Test was about 3.5 hours in a sim ( Type Rating and Instrument rating). I didn't do any practice so I think it is about the cheapest you could do it for.
Total cost was about AU$10,000( no VAT exemption).
Without a Euro Passport.....two chances of work.