(Bloomberg) -- Tesco Plc Chief Financial Officer Alan Stewart plans to step down next year, extending a management overhaul at the U.K.’s biggest retailer.

Stewart will retire next April, Tesco said Tuesday. The move comes as Chief Executive Officer Dave Lewis prepares to hand over to former Walgreens Boots Alliance Inc. executive Ken Murphy.

Tesco said it will search internally and externally for a successor to Stewart.

The CFO joined Tesco in 2014, when Lewis became CEO. Under their management, the retailer bounced back from a massive accounting scandal, streamlined its domestic business with thousands of job cuts and pulled back from some international markets. Stewart’s moves to shore up the balance sheet have helped lift the retailer’s credit rating back to investment grade.

Now the company is wrestling with the challenges of Covid-19, which has boosted grocery demand but required supermarkets to impose social distancing measures, while hastening a shift to online shopping. Soon, retailers will have to turn their attention back to Brexit.

Murphy is set to take over as CEO in October.

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