another option for you might be impossible performance in rochester, which isn't too far from you mate.
I've always had map from there and I really rate them, not many peeps on here use them, but briskoda boys love his maps...really nice and smooth. I made 206bhp and 230 ft/lts at power engineering earlier this year with exhaust and filter.
Mike would do you a good price too if you gave him a ring. Plus the map is custom and he only charges £50 to adjust the map if you add more mods (he fitted my k03s and remaped it for £200..bargain!)