Today 40 years ago, the Tallis Scholars gave their first concert, at once changing the face of British choral singing by their rigour and impeccable musicianship. This disc has been released to coincide with that anniversary. The Tallis's founder and director, Peter Phillips, compares John Taverner's masterpiece of the English Renaissance, the Missa Gloria tibi Trinitas, with the beauty of a Britten opera, an Elgar symphony or a Purcell anthem. It's hard to disagree. The mass, in six parts, makes huge demands on the singers – all in effect having to behave as soloists – and the emphasis as ever with the Tallis Scholars, is on clarity, precision, continuity of line.