Delays of up to 30 minutes on East Coast between York and Doncaster due to problem at a level crossing.
There is no current estimate for when a normal service will resume. Also affecting CrossCountry.
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The constituency of Washington and Sunderland West includes the UK's largest car plant, which was opened by Nissan in 1984.
This seat was formed prior to the 2010 General Election, taking in Sunderland city centre and the Ryhope area to the south.
The constituency of Stockton South includes relatively affluent areas like Yarm and Eaglescliffe.