Labour’s sister party has voted to back a second referendum on the terms of the Brexit deal.

The Co-operative Party, which has 37 MPs who are jointly members of Labour, also backed continued membership of the single market.

At the party’s conference in Bristol, delegates also rejected the prospect of a no-deal Brexit and said the Article 50 period should be extended if an agreement has not been reached by March 29.

The explicit call for a second referendum goes further than Labour’s position, which is only to keep the option of a public vote on the table if a Brexit deal is rejected by Parliament and there is not a general election.

Co-operative Party chairman and MP Gareth Thomas said: “Members of the Co-operative Party have today voted to put the British people back at the heart of the Brexit process, by backing a people’s vote on the final Brexit deal. Our party has also been clear that no-deal is not an option.

“As we work towards building a Britain where wealth and power are shared, it is vital that Brexit does not lead Britain down a path of greater inequality, insecurity and isolation.

“Instead we need a Britain with co-operative values of democracy, equality and solidarity at its heart. This is what is at stake.

“We call on the Prime Minister to listen to the growing number of people and organisations who are saying the people should be in the driving seat.”