Hi mate or Mac...I went through the exercise some years back and it went something like this..
First see the CAA at Gatwick and have your licence/experience assessed. you pay around 100Sterling for the pleasure.Have a CAA medical for around the same price.
The CAA should OK your licence provided your new employer gives the required IFR checks etc and you sit a few minor (!) exams like ATC, systems ect.
Go to Aberdeen where you will be welcomed with open arms.Maybe.
Good luck HH