Mike Ashley is to quit as a director of Frasers Group next month, stepping back from the UK retailer that he originally founded as Sports Direct four decades ago.

Ashley set up Sports Direct in 1982, changing the name to Frasers after he bought the department store chain in 2018.

Michael Murray, Ashley’s son-in-law, became chief executive of the company in May.

“Since Michael Murray took over the leadership of Frasers Group earlier this year, the business has gone from strength to strength,” Ashley said in a statement on Tuesday. “It is clear that the Group has the right leadership and strategy in place and I feel very confident passing the baton to Michael and his team.”

He added that he remained “100 per cent committed” to supporting the company’s plans, and that he would lend Frasers £100mn on the same commercial terms as the group’s existing borrowing facilities.

Ashley had increasingly taken a back seat at Frasers since the appointment of Murray, focusing on the detail of logistics operations at the company’s fulfilment campus in Derbyshire.

Murray recently told the Financial Times his father-in-law was now spending “three to six months a year” outside the UK and “never really wanted to be chief executive”.

“It was only when Dave Forsey stepped down [in 2016] — he had nobody else as the succession planning wasn’t there,” Murray said.

Many of the people that built up what was then known as Sports Direct alongside Ashley have also left, notably Forsey and Karen Byers, who quit as head of retail in 2019.

“We’ve got a young dynamic team and it’s getting younger,” said Murray. But he added that aspects of the culture Ashley created have remained. “We don’t like man management or layers of bureaucracy. We like people to own it and get on with it”.