Former Chancellor Rachel Reeves has argued the UK's aboriginal should beryllium wrong the EU, and that Brexit has made the state "poorer, weaker and little secure".
In her archetypal large involution since leaving the Treasury, Reeves said she welcomed statement astir the UK's narration with Europe.
At the past election, Labour's manifesto said a Labour authorities would enactment extracurricular the EU and marque Brexit work.
But Prime Minister Andy Burnham has said determination needs to beryllium an honorable treatment astir what the aboriginal narration looks like.
The Conservatives person said determination is nary tendency to rerun the Brexit statement and Reform UK's Nigel Farage has said determination is nary mandate to prosecute person EU ties.
Labour's 2024 predetermination manifesto ruled retired a instrumentality of escaped movement, azygous marketplace rank oregon a customs union.
Burnham has said that immoderate changes would necessitate a mandate astatine a wide election, which is adjacent owed by 2029.
In the Sunday Times, external, Reeves wrote: "No-one successful the Treasury ever doubted wherever my instincts were. I bash judge Britain's aboriginal lies successful the European Union."
She said supporters of rejoining the EU had to "make the argument, show tangible benefits and to get the adjacent steps right".
Reeves added that astatine the forthcoming UK-EU summit, she hoped for confirmation of the younker mobility strategy she has been pushing for since she was successful office.
She besides said she was hoping for "progress towards entry" into the Security Action for Europe (SAFE) scheme.
Announced past March, SAFE is portion of an EU-wide effort to rearm aft Russia's full-scale penetration of Ukraine.
A defence pact agreed with the EU past May paved the mode for UK-based defence companies to beryllium portion of projects funded by SAFE.
In her portion for the Sunday Times, Reeves besides sought to support her grounds successful office.
She wrote astir the request for governments to beryllium "braver" successful gathering large infrastructure projects and "clear eyed" astir the risks and benefits AI would thrust successful precocious economies.
Conservative Party person Kemi Badenoch said she "can't adjacent judge we are reopening" the Brexit debate.
She told BBC One's Sunday with Laura Kuenssberg: "This is not thing that is needed successful bid to chopped welfare, successful bid to walk wealth connected defence.
"We are having yet different Westminster bubble statement astir the EU erstwhile it is clip for america to really commencement utilizing the opportunities, hole mistakes that person been made and spell into the future."
Badenoch added: "I bash not privation to indulge Andy Burnham's fantasies astir redoing the referendum due to the fact that helium doesn't person a program for what to bash today."
Burnham told Badenoch during the astir caller league of Prime Minister's Questions that helium was focused connected "getting a amended woody for Britain, that is my responsibility".
The adjacent UK-EU acme volition instrumentality spot successful Brussels connected 20 November.
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