A press regulator has upheld an inaccuracy complaint against the Daily Telegraph and the Express website in reports claiming a public survey revealed most Remainers now backed a “hard Brexit”.

Both titles claimed that more than 20,000 respondents had been surveyed in an opinion poll about attitudes towards the possible outcomes of Brexit negotiations and Britain’s future relationship with the EU.

The actual number of people surveyed had been 3,293. Both titles said they had taken the incorrect figure from a rival publication’s report on the poll.