Bradyll is an early steam locomotive built by Timothy Hackworth at his Soho Works in Shildon, England in 1840.

[1] Bradyll was built to work on the South Hetton Railway, which ran from Haswell to Seaham Harbour.

[2] It was named after Colonel Thomas Bradyll, who owned the mines and promoted the railway and new port built at Seaham.

The locomotive was kept in the 'Council yard' at Burke Street, Shildon during the early 1970's prior to being moved into the display sheds when they opened the Timothy Hackworth Museum.

Bailey believes the engine on display in Shildon is not Bradyll, but rather Nelson, a locomotive built c. 1840 by Thomas Richardson of Hartlepool for the South Hetton Colliery.