Olivier award-winner Simon Hale on the thrill of orchestrating two legends' tracks on Get Up, Stand Up! and Girl from the North Country It's not often you get the green light from Bob Dylan to run riot with his songs. But for composer Simon Hale and playwright Conor McPherson, a call from the Old Vic theatre in 2017 was just that: an invitation to rework Dylan's songbook into a musical, with the blessing of free rein…