Lots of good tuners here in the US using T7suite, not sure about your side of the pond...
do a search here on the perf boards and you'll see lots of feedback regarding the tuners. JZW is popular, rabbit is doing tunes, and MikeD as well, but I think MikeD prefers somewhat to deal in person. The others would probably be more than happy to ship you an ECU.
just get "torque" app on your phone and bluetooth obd2 adaptor. it will give you all kinds of number as well as cel codes if you have them. i typically get realtime boost, hp, and g's.
its a nice app to have and handy.