Vauxhall mechanic round the Egham Surrey area ?

[Tampon]

Hello guys my Vectra has been playing up recently and I have tried my hardest to fix it but seem there is a problem with the CIM electronic thingy.

I believe it need a mechanic with a tech 2 machine to install a new one ( way above my skills ). There are 2 vauxhall garages ( same chain ) near me but they both have awful reviews about some of their business practices so I would like to stay clear of them.

Can anyone recommend a garage or mechanic they knwo that could do this type of work ?