Dyno/RR recommendations

[donkmeister]

I'm interested to see what my 12 year old car is putting out - well-serviced so hopefully near-enough what it did when first run-in. More for interest than anything, but it would be a good baseline if I do any upgrades.

I'm not after a flattering printout, I want an accurate one, so do we have any well-regarded dyno places around (I'm in North Herts / Bedfordshire area)?