Look into RSTuner.
TDF or RST
I've just remapped mine with the RS tuner today, very simple to use just need to download the correct OEM calibration file to update the software and then just load the performance calibration. Takes about half an hour in total. I'm in Leicester too if you need a hand just give me a shout.
Yeah no worries drop me a pm after 12th July as I'm going away to USA for 2 weeks on tuesday. It costs around £65 for the unlock code and maps. Think we might be able to use the maps I downloaded if they are the same ones required as yours, saves buying them again. Does anyone know if this can be done?