Sir Nigel Gresley steam Locomotive. 

Sir Nigel Gresley was a famous British steam locomotive, one of the iconic members of the London and North Eastern Railway (LNER). It was named after the celebrated engineer Sir Herbert Nigel Gresley, who was one of Britain’s most prominent locomotive designers in the early 20th century. Sir Nigel Gresley designed many influential steam engines, including the famous Mallard, which holds the world speed record for steam locomotives.
The Sir Nigel Gresley locomotive itself is part of the LNER Class A4 Pacifics, a series of streamlined locomotives known for their distinctive, sleek design and speed. Here are some key facts about the engine:
Built: 1937, at Doncaster Works.
Top Speed: Capable of speeds over 100 mph.
Service History: It was primarily used for hauling express passenger services, notably the prestigious Flying Scotsman route between London and Edinburgh.
Number: 4498, later renumbered 60007 in British Railways service.
Retirement: It was withdrawn from service in 1966 but preserved and returned to operation.
The Sir Nigel Gresley locomotive is a much-loved example of British engineering, and it continues to run on heritage railways today, often admired by steam enthusiasts for its engineering and historical significance.