Following England's 4-1 Ashes series loss to Australia, former player Kevin Pietersen suggested bringing back Andy Flower as head coach. Pietersen believes Flower, who previously led England to Ashes and T20 World Cup victories, has evolved and can adapt to modern cricket. Flower's earlier tenure saw significant success, including reaching the top of Test rankings. The article notes McCullum's aggressive style revitalized England but ultimately did not secure the Ashes.