Mate, I'll try and be more help. Having worked in Darwin myself,Airnorth & Pearl, I can guess the type of flying your doing. Unless you have a lot of heavy jet time you do need to redo all UK ATPL (a lot of sweat, tears and piles of money). Also you will need the right to live and work in the UK, no help from any airlines, as there are many local pilots with ATPL's looking for work, albeit mainly low time. Cheers and good luck!