David Davis has blasted peers in the House of Lords for trying to "frustrate" Brexit negotiations after they inflicted a hefty defeat on the Government over the European Union (Notification of Withdrawal) Bill.
Following the first amendment, which if enacted with oblige the Government to guarantee the rights of migrants currently living in the UK, peers have backed a motion to ensure a meaningful vote on the final deal.
Following three hours of exchanges, the Lords voted 366 to 268 to adopt the second amendment.
Brexit Secretary Davis, while expressing his disappointment, insisted the vote will be overturned when the bill returns to the House of Commons.
He said: "It is disappointing that the House of Lords has chosen to make further changes to a bill that the Commons passed without amendment.
"It has a straightforward purpose - to enact the referendum result and allow the Government to negotiate a partnership with the EU.
"It's clear some in the Lords would seek to frustrate that process, and the Government intends to ensure this does not happen.
"We will aim to overturn these amendments in the House of Commons."
Lord Heseltine has been sacked as a Government advisor for his decision to back the amendment, and told talkRADIO this morning that Theresa May will seek to paint him as a "funny old fart" for his decision.