Crowds flocked to stations across Hertfordshire on Saturday to catch a glimpse of an historic steam train.

The locomotive, known as Blue Peter, started its journey to York from King's Cross, before taking the Hertford loop line from Alexandra Palace to Stevenage, where crowds gathered to see the train.

The LNER Peppercorn Class A also passed through the likes of Hitchin, Cuffley and Watton-at-Stone, where more had flocked to catch a sight and snap pictures.

The historic locomotive was built in March 1948, and named Blue Peter after the famous race horse that won the Epsom Derby and the 2000 Guineas in 1939.

Hauling passengers for the British Railways' North Eastern Region in the north of England and Scotland, the locomotive was in service until 1966.

After being withdrawn from service, Blue Peter sat under restoration until 1974, and then returned to the main line as part of railway tours.

After the expiration of its mainline operating certificate in 2002, the last surviving Peppercorn Class A sat dormant until it run under its own steam for the first time in 22 years earlier this year.