Labour has been urged to join a cross-party bid to keep the UK in the single market and customs union after Brexit.

The SNP, Liberal Democrats, Plaid Cymru and Greens have joined forces to back an amendment to the EU (Withdrawal) Bill when it returns to the Commons this week.

If passed, the move would stop ministers being able to use so-called Henry VIII powers to take Britain out of the single market and customs union.

The move follows a Brexit summit by the leaders of the four parties which Labour refused to attend.

SNP Westminster leader Ian Blackford said: "Time is running out to prevent the economic catastrophe of an extreme Tory Brexit.