Sinfini Music's resident culture vulture Jonathan Lennie picks his UK classical highlights for May 2015, with concerts from London to Glasgow and most places between. Use the links below to navigate through the month ahead and make sure you're at the front of the queue for tickets. The music of Polish composer Karol Szymanowski is ravishing, and his 1926 opera King Roger is no exception (curiously only now receiving its first Royal Opera performances).