The man who headed up Vote Leave ahead of last summer's EU referendum now says Brexit will be an "error."

Dominic Cummings also said David Cameron's decision to call the referendum was "dumb" in an extraordinary admission on Twitter.

Cummings served as special advisor and was responsible for the bus advert which claimed Britain would save £350m a week for the NHS by quitting the EU.

But now he is apparently regretting this stance, judging by a reply he sent on Twitter to a question by Financial Times journalist David Allen Green.

Green asked Cummings: "Is there anything which could now happen (or not happen) which would make you now wish Leave had not won the referendum result?"

In response, Cummings said: "Lots! I said before REF was dumb idea, other things shdve been tried 1st.

"In some possible branches of the future leaving will be an error."

Cumming's u-turn will likely be seized on by Remainers, who claim the Leave campaign was based on nothing more than lies and empty rhetoric.

Boris Johnson, who served as a figurehead for the campaign along with Gove and Nigel Farage, has recently distanced himself from claims that the money saved via Brexit will go directly to the NHS.

Farage himself has taken a step back from political life after quitting as UKIP leader in the aftermath of the election, while Gove took a hiatus before being appointed environment secretary in Theresa May's cabinet reshuffle last month.