Plot: ‘Behold, the sea itself!’ Vaughan Williams’s A Sea Symphony takes the poetry of Walt Whitman and opens the floodgates to a spring tide of inspiration. Andrew Manze’s Vaughan Williams recordings have been praised for their ‘rare sensitivity and warmth’, and in the composer’s 150th-anniversary year, A Sea Symphony gets the deluxe treatment from two of the BBC’s great symphonic choruses, plus the operatic voices of soloists Elizabeth Llewellyn and Andrew Foster-Williams