Dr Martens’ owner has entered talks with private equity firm Permira, as it eyes a sale of the footwear brand and retailer.

R Griggs Group, the British family concern that owns Dr Martens, is understood to be in advanced negotiations with Permira. Sources said a deal could be completed as soon as next month.

Dr Martens has been valued by one source at almost £300m, although it is unclear what Permira is offering for it, according to Sky News.

It understood the deal had gained approval of Permira’s investment committee but that it is yet to be sealed.

It is the second time the Griggs family has tried to sell the brand in two years. Last year, the family scrapped an auction – which drew attention from other private equity houses Electra Partners and Pamplona Capital - after buyers failed to stump up the asking price.

Spokeswomen for Permira and R Griggs declined to comment.