This year was the 15th anniver­sary of Green Man, the bucol­ic fes­ti­val set in the Bre­con Bea­cons. It is – since the demise of Big Chill – my favourite fes­ti­val venue, with its lush moun­tain­ous set­ting and main stage framed dra­mat­i­cal­ly by the Black Moun­tains. For those short of stature (like myself), you’ll always have…