Any Micra specialists in the Lancs area?

I'm in over my head fixing this sticking high idle issue, a few bits of cleaning here/there I can manage, but going from Polly's guide I have to mess with timing and more to get to the core of the problem.

Is their any reputable K11 loving mechanics in the Lancs area? as the ones I know either refuse to even look at Datascan + Consult or flat out ignore me.