UK supermarket giant Asda has dominated headlines for the last year for a host of different reasons: turmoil at the top, declining market share and issues with a significant IT upgrade. The grocer’s market share fell 5.8 per cent between December 2023 and 2024, while the market share of all other major UK supermarkets grew. Now, returning boss Allen Leighton is spearheading a turnaround aiming to bring the supermarket back to its roots. “Everyon…