They will want all results of your LFTs and units consumed if you've disclosed them to the GP, the medical form DD2 will cover all your LFT results and all your alcohol history documented with your GP, from this evidence supplied to them and your DVLA medical they will be able to make a decision wether to licence you or not and class you into dependance or misuse catergory, which ever catergory you are classed into will carry the 6/12 months abstination, however if you have abstination medical evidence to support your application then they may take this into consideration and issue you a 1 year temp licence, which ever way you look at it you will get a 1 year temp licence because you have alcohol issues documented with your GP, if they do class you as dependant you can never admit to a drink again otherwise DVLA will revoke your licence and 12 months abstination will be required again ,,,,,