Are you the same Andrew and Peter Briddon that appeared on Channel 4's “Scrapheap Challenge”?
Yes, it was the Christmas 2004 “Mega Challenge” to celebrate 200 years of Trevithick and the Pen-y-Darren loco. At the time of filming Andrew was still 17 and the television company (RDF) had to get special permission from their insurers as the normal minimum age was 18. The “intro” filming included shots of “Claire” when based at Peak Rail. At one point Andrew was posed on a kiddies "ride on" engine on the platform with his Dad standing behind to obscure a grey cabinet - (Director: "You look at lot better than that box." Peter: "That's the nicest thing you've said to me all day.") The challenge was to mate a B5 bogie with an old tractor which had a seized clutch mechanism. RDF did not expect us to 'fix' the tractor's clutch and certainly had not foreseen the belt-drive arrangement we adopted ("We do NOT weld things to axles") which seemingly delighted the television producers – judging from the close-ups of pulleys running slightly eccentric! We apparently came last, and learned much later that the steam was to win no matter what (from a lecture given by Richard Gibbon at Leeds Uni) but figured that we gave the best overall entertainment, as we careered past the finish line at full tilt with the brakes having jammed off.
For five years Channel 4 kept up their web-page on this edition: no sooner had we put a link to it than they changed it! Reputedly the show still pops up from time-to-time on some digital/satellite channels.