Angela Eagle is set to formally challenge Jeremy Corbyn over the Labour leadership, ITV News understands.
Deputy Political Editor Chris Ship said it is most likely to happen tomorrow if Corbyn does not resign.
The leader of the UK's biggest trade union has said the country is 'riven' as a result of the EU referendum.
Len McCluskey told ITV News that the trade unions can help broker a peace deal and reunite the party now the "coup has failed".
Labour leader Jeremy Corbyn said he would 'reach out' to MPs that oppose his leadership but said they should 'respect democracy'.