The appointment highlights the role of IT in Tesco’s business and follows 18 busy months of IT implementation.

Over the last decade Clarke has overseen a number of large IT changes at the supermarket chain, including introducing systems to improve sales, the supply chain and efficiency across the company.

Last year the group made £550m in savings following the implementation of its Step Change efficiency programme, which involves IT improvements as well as general process efficiencies.

Clarke has been with Tesco for 29 years occupying various positions through the years. He joined the Tesco board in 1998, and then he assumed the responsibility for the group supply chain, taking over the role of looking after group IT a year later.

In January 2004 he was made responsible for international operations in addition to his IT responsibilities. Outside of his tech role he has overseen the opening of new stores and operational improvements across Asia and Europe.

Clarke replaces Sir Terry Leahy who has been at the helm of the group for 14 years.