Redstlee was looking into dreamscience, might be best to drop him a pm and ask. You've got motorsport developments in blackpool as another possibility

http://www.motorsport-developments.co.uk/custommapp.html
Custom ECU Remapping: During custom mapping, we run the vehicle on our dyno or out on the road with a data logger, knock detection equipment and wideband AFR monitoring gear and assess what parts of the ECU calibration require work and then go back to the workshop and re calibrate the necessary parts of the calibration on the PC before uploading it back into the ECU and performing the same test again.

This is repeated until such time as the calibration is as close to perfect as we can get it. Normally this can be done to an exceptional standard in one day at a cost of £250 all in. (This is often all you can do with a modern ECU that cannot be done live.)

Live ECU Mapping: (Not available for all types of ECU)
During live mapping, we will attach an emulator to the ECU and actually access the information within it whilst the engine is running and the ECU is in use. This is the ultimate form of mapping and usually gives far more accurate results than simple chipping or remapping and is usually quite a lot better than a custom mapping session too because we can adjust the data at the same time as the ECU is supplying results to the engine and so can assess the results in real time which makes it the ultimate way of finding little glitches, hesitations and flat spots. This is doubly true for those engines that have strayed from the norm and are now utilising uprated cams, ported heads, altered compression ratios etc. Live mapping on our dyno costs between £250 and £500 depending on the type of vehicle and work that needs doing. Average cost is £300.