The EU is still insisting that negotiations about future trade relationships between the UK
and the EU cannot begin until the UK’s fee for leaving the EU has been agreed.
The by-election is due to take place on February 23. Eligible voters have until midnight on February 7 to register in time to take part in the by-election.
Labour retained the seat in 2015 with a majority of 5,175 over UKIP with the Conservatives a further 33 votes behind. Labour has held the seat since its creation in 1950.