The UK Parliament will on Tuesday start five days of debate on the UK's future relationship with the European Union, culminating in a vote next Tuesday. The debate comes as the European Court of Justice announced on Tuesday that the UK can unilaterally revoke its withdrawal from the EU. May's chances of winning majority backing for the deal when Parliament votes on December 11 look slim. Politicians on both sides of Britain's EU membership debate oppose the agreement that May struck with the bloc - pro-Brexit ones because it keeps Britain bound closely to the EU, and pro-EU politicians because it erects barriers between the U.K. and its biggest trading partner.