Labour's Tracy Brabin will face nine other candidates in the Batley and Spen by-election which was called following the death of Jo Cox
Severe Delays on Trains Between Sheffield and London
There are severe delays on trains between Sheffield and London, due to a partial bridge collapse.
Network Rail said the incident at Barrow upon Soar, near Loughborough in Leicestershire, meant no direct trains are operating between St Pancras and stations north of Leicester, including Sheffield and Nottingham.
An NR spokeswoman said: "Owing to a bridge collapse at Barrow upon Soar, train services between Leicester and Loughborough will be disrupted.
"This will affect journeys on the London St Pancras/Nottingham/Leicester and the Leicester/Lincoln/Grimsby routes.
"We are working to clear the track as quickly as possible and reopen the line; however, passengers are advised to check before they travel and allow extra time for their journeys.''
East Midlands Trains said in a statement that Network Rail teams had been working through the night to remove debris from the railway following the collapse in the early hours.
The operator said the line was not expected to reopen fully on Tuesday, meaning no direct trains would run between St Pancras and stations on its route north of Leicester.
Advising passengers to use alternative routes, the company said: "There will be severe disruption and a significantly reduced service running between Leicester and London St Pancras.''
A wall and a large section of brickwork supporting the road over the bridge fell on to the line at about 2am.
Local people said part of a footpath in Grove Lane, which passes over the bridge, had recently started to subside.
A spokesman for Severn Trent confirmed that the collapse damaged one of its water mains but no customers had been affected and the pipe had already been repaired.
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