The fitness company behind high-end exercise classes Barrecore, Boom Cycle, and Kobox has suddenly shut all its studios.

Common Bond emailed customers announcing its locations, all of which are currently in London, were closed “until further notice”.

The firm describes itself as a wellness collective and charges £2,400 for 12 months of unlimited classes. It also runs Reformcore and Triyoga brands and said in August last year it had ten sites.

Its website is no longer publicly accessible. The BBC has contacted Common Bond for comment.

The email sent to customers on Wednesday seen by the BBC said: “We’re sorry to let you know that all Common Bond studios are closed until further notice.

“We sincerely apologise for the inconvenience and disruption this may cause . We understand this is frustrating, and we appreciate your patience while we work through this.”

Instructors have told the BBC they were told last week they would not be paid on time and that they only found out about the studios closures from the Wednesday email.

One instructor said she and her colleagues were told their pay would be delayed on the day it was due on 14 August.

She said: “In good faith, I continued to teach my classes without any news on when or if payment would be made. I have heard absolutely nothing since.”

It is not clear how many instructors and customers have been hit by the sudden decision to shut the studios down.

Companies House filings for Common Bond show the company was incorporated in June last year, so has it has not yet published any accounts.

The most recent filings show a director, Ben Allen, left the role last month.

Gaspar Lipszyc, listed as a Belgian national living in Spain, is the only currently shown director of the company.

Barrecore is a brand specialising in barre, a fitness discipline that combines pilates, ballet, and yoga.

Barre is a low impact exercise and its popularity has soared in recent years as famous names including Pippa Middleton have praised its benefits.