Train-spotters flocked to stations across Hertfordshire on Saturday to catch a sight of the legendary steam locomotive Sir Nigel Gresley.

The train started its journey from London Kings Cross to York at 7.57am, and was quickly steaming through Herts, with people gathering at Stevenage, Hitchin, Welwyn Garden City and Potters Bar.

The iconic engine then passed back through the county later that night, with plenty braving the rain and cold as they headed out to see it.

Sir Nigel Gresley is an LNER Class A4 4-6-2 ("Pacific") steam locomotive built to a design of Sir Nigel Gresley in 1937 at Doncaster Works.

The locomotive holds the post-war speed record for steam locomotives on British Railways, and was withdrawn from service in 1966.

Clad in its stunning blue livery, it is among the world's most iconic and instantly recognisable trains alongside The Flying Scotsman and the Mallard.