Mary Honeyball, a Labour MEP for London, was among the 26 British representatives in Strasbourg who have been accused of betraying their own country.
Ms Honeyball and her colleagues voted for a proposal put forward by the European Parliament’s Brexit chief Guy Verhofstadt, that urged the EU not to start trade talks with the UK.
The 26 were branded “appalling” by one Tory MP, who accused them of deliberately voting against Britain’s national interest on Brexit.
Nigel Farage said the vote represented how the EU treated the UK as a hostage and demanding their ransom.
Earlier today, Theresa May barred two of their own MEPs after they broke the party whip and voted for a motion demanding UK do more to meet EU demands.
Anushka Asthana, hosting BBC’s Politics Europe this afternoon, challenged the Labour MEP on her reasoning for the “unpatriotic vote”.
Asthana asked: “It is the national interest of the UK to push on to trade talks, so why did you vote against the national interest?”
Ms Honeyball tried to defend her move by blaming her own country for forcing the vote.
She said: “We voted for the resolution because we want to see the talks continue.
“We are concerned that there has been a lack of progress, largely down to the UK side.
“The UK agreed to the issues that would be resolved first – the Irish border, financial settlement and EU citizens – we agreed on that, and the issues are just not resolved yet.”