Your one year base freeze is, as I understand it, only if you wish to transfer from one type to another. When I was allocated my base, I could choose between a few, and was told that if I had another preference than any of those, then I could apply from day one on the training course and probably be moved to the base of my choice just after line training.
It seems they are very flexible as long as there are open positions on the base you wish to transfer to. Only thing is if you are going on the 737 and opt for an 319 base, (or opporsite) then the freeze applies.
Held og lykke med det