Sir Keir Starmer has warned Britain “won’t go back to normal” no matter whether Britain leaves the European Union or decides to stay.
The shadow Brexit secretary said the country would remain divided, regardless of whether a second referendum was held.
He said the only way to unite the country was to ensure people no longer felt disenfranchised.
“Anybody who thinks that the deal with Europe is going to resolve the issue, needs to think again,” he said.
“This isn't going to be resolved. There isn't going to be a happy day, when it's either the deal or remain is decided and it just goes back to normal.”
Sir Keir’s comments came on the same day Jeremy Corbyn released the party’s manifesto that contained a pledge to negotiate a new deal with the EU and hold a second referendum on Brexit within six months.
He said despite his belief the country would remain divided a second vote would help rebuild trust in politicians.
“If millions of people tell you that a political or economic situation isn't working for them, you've got to listen to that,” he said.
“We're never going to get past Brexit if we only focus on one part of it: the deal.”
Labour will on Friday launch a voter registration drive, urging those eligible to register before next Tuesday’s deadline.
Applications to register to vote in the December 12 general election must be submitted by 11.59pm on Tuesday November 26.
A total of 2,048,039 applications were submitted between October 29 and November, with more than a third of these coming from people under the age of 25.
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