I have received some info re http://www.motorsport-developments.co.uk who are based in Bispham. As well as engine mapping they have a dyno capable of running 2 &4 wheel drive cars. the prices allso look very reasonable. For three power runs the cost is £60 any further runs post timing changes etc are £10. They also do reuced prices for groups of vehicles so maybe the Blackpool region can get a group together. Have a look at the website for further info.
Local TVR Specialists