MPs will be able to try and reshape the PM’s Brexit strategy by tabling amendments to the Withdrawal Agreement Bill.
Mr Hammond revealed he would “probably” oppose efforts to put the Brexit deal to a referendum vote, but could support a bid to compel the prime minister to negotiate a future customs union with the EU.
He also vowed to stand at the next election as an independent candidate, if he does not have the Conservative whip restored by Mr Johnson.
But Mr Hammond, who has now consistently voted against the PM in Brexit votes, promised he would not try to “curry favour” in an attempt to be readmitted to the Tories.
“I am not going to change what I say and what I believe and what I think is important for Britain’s future in any kind of attempt to sneak back in and curry favour with the Conservative leadership,” he said.