By Frank Dalleres Until now, about the most adventurous aspect of Gareth Southgate’s eight-year tenure as England manager has been his decision to dispense with the trademark waistcoat. But at Euro 2024 he has resembled the last of the high rollers – comparatively speaking, at least – by dispensing with the safety-first approach that has characterised his time in charge. Southgate’s success at previous tournaments has been founded on solidity, whether it was the back three at the 2018 World Cup or the Declan Rice-Kalvin Phillips midfield axis at Euro 2020. With Phillips and Jordan Henderson ou…