A hip Haggerston bar at the centre of a bitter family feud is set to close because “poor trade has made the restaurant business unprofitable”.

Plans have been submitted to Hackney Council to turn Proud East into offices and a sign on the window is prematurely advertising the “unique opportunity” to buy one. It follows the closure of the flagship Proud Camden earlier this year.

The large venue in Hertford Road, Haggerston, which fronts the Regent’s Canal, was originally set up by Hector Proud in 2013 as the Proud Archivist.

It became a popular entertainment and arts venue with comedy nights from the likes of Russell Brand, music events and art exhibitions.

However in 2016 it was taken over by his brothers Christopher and Alex who turned it into a pool room and renamed it Proud East.

They made the front page of the Gazette at the time when they hired a bouncer to stop punters using the toilets at a comedy night organised by Hector next door.

The pair went on to try, and fail, to seize the adjacent office their family was letting out to Hector.

Proud Estates, a family firm headed by their mother Ulrike since the death of her husband last year, is now trying to sell the unit.

“We allowed our lease to end,” said Alex, an art dealer who appears on Channel 4 “Four Rooms” and nightclub owner.

“We are going to move on because the landlord wants it to be converted. They are ending the lease, and there is a break clause. That’s the landlord’s decision and one we respect.”

He added: “It’s my family’s business, but it’s a decision made on a commercial basis, and it’s not a decision my mother made on her own.

“I suspect there’s an oversupply of restaurants and bars in that area, and I suspect there’s also not an oversupply but an undersupply of office space. You find daytime wise that area could do with more office workers, and mid-week it’s really dead. I suspect you are seeing the market correct that.”