Disruption between London and Stevenage 

Route(s) affected

Grand Central between London Kings Cross and Bradford Interchange / Sunderland

Great Northern between Moorgate and Welwyn Garden City, and also between London Kings Cross and Letchworth Garden City / Cambridge / Peterborough / Kings Lynn / Ely

Hull Trains between London Kings Cross and Hull

LNER between London Kings Cross and Lincoln / Leeds / Bradford Forster Square / Harrogate / York / Hull / Middlesbrough / Edinburgh / Aberdeen

Lumo between London Kings Cross and Edinburgh

Thameslink between between Brighton and Cambridge, and also between Horsham and Peterborough, and also between Sevenoaks and Welwyn Garden City

Description

Trains are running normally following a fault with the signalling system between Alexandra Palace and Welwyn Garden City.