Dave Grohl has spoken out on the cancellation of Glastonbury, claiming that the beleaguered festival will definitely make a return when the coronavirus pandemic subsides.It comes after Michael and Emily Eavis confirmed that the iconic event will take an enforced fallow year for the second summer in a row, after the 2020 edition of the Somerset event was also called off last March due to COVID-19 concerns.Grohl, who headlined Glastonbury with Foo Fighters in 2017, told The Telegraph: “I know what