and fuel efficiencies, it was found that Rocket would still have won, as its relatively modern technology made it a much more reliable locomotive than the others. Novelty almost matched it in terms of efficiency, but its firebox design caused it to gradually slow to a halt due to a buildup of molten ash (called "clinker") cutting off the air supply. The restaged trials were run over the Llangollen Railway, Wales, and were the subject of a 2003 BBC Timewatch documentary. This restaging should not be taken as accurate as there were major compromises made for television and because of the differences in crew experience, the fuel used, the modifications made to the replicas for modern safety rules, modern materials and construction methods, and following operating experience. Sensible comparisons were made between the engines only after calculations took into account the differences. The replicas had major differences from the 1829 originals. References Notes Footnotes Sources External links Rocket and its Rivals Details of 2003 Timewatch episode at Highbeam Historic transport in Merseyside History of rail transport in the United Kingdom 1829 in rail transport 1829 in England October 1829 events