In 1808 Trevithick publicised his steam railway locomotive expertise by building a new locomotive called 'Catch me who can', built for him by Hazeldine and John Urpeth Rastrick at Bridgnorth near Stourbridge, similar to that used at Pen-y-Daren and named by Mr. Giddy's daughter. This was Trevithick's third railway locomotive after those used at Pen-y-Daren and the Wylam colliery. He ran it on a circular track at Torrington Square, near the present day Euston Station in London. Admission was one shilling including a ride and it was intended to show that rail travel was faster than by horse. This venture also suffered from weak tracks and the interest from the public was limited. Trevithick was disappointed by the response and designed no more railway locomotives. It was not until 1812 that steam locomotives built by other engineers started replacing horses for hauling coal wagons at the collieries.

He went on to research other projects to exploit his high pressure steam engines: boring brass for cannon manufacture, stone crushing, rolling mills, forge hammers, blast furnace blowers as well as the traditional mining applications. He also built a barge powered by paddle wheels and several dredgers.

Trevithick saw opportunities in London and persuaded his wife and 4 children reluctantly to join him in 1808 for two and a half years lodging first in Rotherhithe and then in Limehouse.