Wow, quite the hot topic this appears to have become. I had best introduce myself, I'm Tom the owner of TCS.
Firstly my apologies go out to Eigdoog of the problems that day. The car in question that was on the dyno is one of my long term customers who i actually sponser as well. The car indeed needed to be done that day as we was taking it to brands hatch the next day for a race weekend. It had developed an unforseen problem that meant the job ran late. At the first point of realising this was going to be the case we did try to call 'Eigdoog' but it was too late as he must have already left.
In response to the compensation arguement, i would of course have discounted the price of the power run either if he had waited or if he had returned the Monday after the saturday this happened (bank holiday monday) as he said he was ok to do.
Its a shame he couldnt voice his concerns to us on the day rather than having to come on here and do it as im sure if he would of we could of sorted something there and then as we are not in the business of pissing people off.
The work we do here is predominantly motorsport work, for instance 75% of the cars i have on the dyno are historic F1 and old F5000 cars, i sponser Jake Hill in the Ginetta GT championship (one of the BTCC support races) and we feature heavily in the mini7 club and many 750mc and cscc championships. Because of this we dont tend to take on many power run sessions any more incase of reoccurrences of this type of thing.
Its not a case of us 'not giving a fuck' as one person so eloquently put it. Motorsport work is our life and our passion and im afraid it will always come first. 99.9% of our customers understand this but then 99% of our customers are motorsport ones.

Once again, apologies Eigdoog. If you still feel aggrieved about this event then i will happily compensate you your fuel money as a gesture of goodwill.