Hampstead High Street and Muswell Hill Broadway could lose their Maison Blanc stores under a review that has been launched into the high-end patisserie chain.

Property advisory firm Davis Coffer Lyons has been brought in to assess the future of its 13 stores. The strategic review will also look into the production unit at Park Royal.

No decision has yet been made and any changes to the artisanal bakery are only at consultation stage. But the announcement places roughly 300 jobs at risk.

The company employed 275 staff and made a loss of £2.9 million in the year to 31 December, 2014.

The business was founded by Michelin star chef Raymond Blanc in 1981. It is now owned by Fadwa Al Homaizi’s Kout Food Investments, which also owns motorway cafe chain Little Chef and Costa Coffee.

A Maison Blanc spokesperson said: “Maison Blanc have announced the appointment of Davis Coffer Lyons as specialist advisors as part of a strategic review into its current trading locations, this also includes the Maison Blanc production facility at Park Royal in London.”