A House of Lords committee said it could leave UK businesses out-of-step with European counterparts.
Oxford West MP Layla Moran is currently second favourite in the party leadership race, although she has yet to confirm whether she is standing.
Yahoo UK spent the night in Parliament Square as Brexiteers told us: 'This is the day he’s been fighting for for decades.'
Leave Means Leave has asked for revellers to come in 'good voice to sing some patriotic songs and bring along as many Union flags as they can'.
A version of Beethoven's Ode to Joy, which is the organisational anthem of the EU, has taken the top spot in the iTunes UK singles chart ahead of Britain's departure from the bloc.
'The bill is now law and confirms our departure from the EU on January 31,' Brexit secretary Steve Barclay tweeted.
In comments reported by Politico, Stefaan de Rynck said the next phase of the UK's departure from the EU will be more complicated.
Guy Verhofstadt said he had been assured by the UK Government that people who fail to apply for settled status will be permitted to continue living in the UK.