Patisserie Valerie has discovered "significant, and potentially fraudulent, accounting irregularities" in its accounts.

As a result, it said "there is potential material mis-statement of the company's accounts".

"This has significantly impacted the Company's cash position and may lead to a material change in its overall financial position," it said.

Patisserie Valerie has asked for its shares to be temporarily suspended from trading while it deals with the problem.