Fes­ti­val sea­son has moved into high gear. Sev­er­al have sold out (Green Man, Kendal Call­ing and Beau­ti­ful Days to name just three – and Ral­ly is close to sell­ing out) but there’s still over­all plen­ty of choice. Our list includes sev­er­al met­ro­pol­i­tan (non camp­ing) shindigs too, right into Sep­tem­ber. If you’re des­per­ate to attend a…