This collection of Walton's choral music from Cambridge's Choir of St. John's College is immediately recommendable (regardless of whether you generally warm to church music - I recommend this as a firm atheist). As opposed to, say, the Finzi Singers on Chandos, the Cambridge Choir uses boy trebles rather than female singers (which surely has both pros and cons).
The Coronation Te Deum and The Twelve are probably the best known works here, and a brilliant, affirmative piece the former is, splendidly sung. Some might be bothered, though, by the fact that the Cambridge Choir's version is a little too intimate, and doesn't really capture the intended splendour. The Twelve is more unconditionally convincing in that sense - and just as well sung - but for my money, the finest piece here is the Missa Brevis, a delightful, intimate work. I don't understand the rationale behind including the Passacaglia from Henry V, but never mind - this is a warmly recommended collection.