IT was full steam ahead for train fans when a famous loco once owned by Billy Butlin came puffing through.

Former Caldicot Comprehensive School chemistry teacher Allen Lloyd captured the Royal Scot at the Severn Tunnel junction on its way to Cardiff, before catching it on its return climbing from Caldicot Halt towards Chepstow and onto Lydney.

Firstly called The King’s Dragoon Guardsman when built in 1930, it swapped identities with the original Royal Scot in 1933, before being sent to the Century of Progress Exposition that year in Chicago, touring the US and Canada in an 11,194-mile trip across the North American continent, where more than three million people came out to see the loco.

After returning to Britain, she worked on the railroads until 1962 when she was bought by holiday camp tycoon Billy Butlin and set on a plinth at Skegness.

In 1971, it moved to the Bressingham Steam Museum and was returned to steam, running until 1978 before again becoming a static exhibit.

In 2009 it was acquired by the Royal Scot Locomotive and General Trust (RSL>) and was moved by road to Pete Waterman’s LNWR Heritage workshops in Crewe for full restoration, returning to the tracks in 2016.

Allen posted on Tueday, September 14: “LMS locomotive no. 46100 “Royal Scot” made a magnificent sight today, twice travelling in the Caldicot locality.

“It was hauling a steam special charter from Kingsweir (South Devon) to Cardiff via the Severn Tunnel and then returning to Kingsweir, but by the more scenic route along the River Severn and via Gloucester.

“The first image was from the end of the Severn Tunnel Junction platform, as the loco powered away from the Severn Tunnel, easily handling its 750 ton load…

“The other images show it powering up the climb from Caldicot Halt, towards Chepstow.”