Not every Yuletide fixture need be commercial and routine. Certainly St John’s annual Christmas Festival packs them in, but why wouldn’t it when the voices for the last two events, backed up by no less than the Orchestra of the Age of Enlightenment, are the best you could possibly find for the great monuments of Handel and Bach?

Nothing tests small-hall acoustics better than that most exuberant of holies, the Sanctus from Bach’s B minor Mass. After one of the year’s big disappointments, the blowsy sound coming from chamber ensembles in the Barbican/Guildhall School’s new Milton Court –  a surprise miscalculation from Arup acousticians -  it seemed imperative to get back to Kings Place’s Hall One, which feels bigger but is some 200 seats smaller (420 to Milton Court’s 608). And oh, the clarion cries of the 32 young Cambridge choral singers!

There’s a reason why many people think Handel and, particularly his Messiah, is dull. Relatively easy to play, his music is incredibly difficult to perform well. Take this Temple Winter Festival outing with choral expert David Hill conducting the immensely skilled BBC Singers who can, and largely do, sing everything; four soloists all banishing grandiose, wobbly vibrato from days of yore; and the accomplished St James’s Baroque. There was nothing wrong with the performance... Unless, that is, you wanted the intensity, passion and, yes, the drama that Handel wrote.

For seasonal fare that’s also profound, few pre-Christmas weekends in London can ever have been richer than this one. Hearts battered by John Adams’ nativity oratorio El Niño last night, one hoped for more soothing medicine this afternoon in the naïve and sentimental music of Berlioz’s sacred trilogy, first performed some 145 years earlier.

John Adams’ millennial conflagration of musical poems about childbirth, destruction and the divine made manifest not only served as a seasonal farewell and a transcendent epilogue to the Southbank’s year of 20^th-century music The Rest is Noise; it also stood pure and proud as a masterpiece.

“Translated Daughter, come down and startle/Composing mortals with immortal fire.” So W H Auden invokes heavenly Cecilia, patron saint of music, and it seems she did just that with Benjamin Britten, who set Auden’s text for unaccompanied choir and happened to be born on the saint’s day 100 years ago.

Earlier this year early music ensemble Stile Antico released a really fabulous disc. The Phoenix Rising is a collage of the Tudor church-music classics that all gained their status and familiarity thanks to the work of the Carnegie Trust and their Tudor Church Music edition. The recording has – very deservedly – won or been nominated for a handful of awards, and if this were a CD review I’d be able to leave it at that. Unfortunately it’s a concert review, and last night’s performance at Cadogan Hall was a different matter.

How many reviews of War Requiem do you want to read in Britten centenary year? This is theartsdesk’s fourth, and my second – simply because though I reckon one live performance every five years is enough, Rattle’s much-anticipated Berlin Philharmonic interpretation fell almost entirely flat, and I wanted to hear at least one good enough to move me to tears.

Back at the Barbican for a new season after a Far Eastern tour, the BBC Symphony Orchestra returned to pull off a characteristic stunt, a generous four-work programme featuring at least one piece surely no-one in the audience woud have heard live before. This time, the first quarter belonged exclusively to the unaccompanied BBC Singers in one of the most demanding sets of the choral repertoire. After which the seemingly humble but dogged and vivacious Marc Minkowski helped create orchestral magic of three very different kinds, defining French composers’ infinite capacity for play.

If ever there were a week for London to celebrate Poulenc in the lamentably under-commemorated 50^th anniversary year of his death, this is it. Two major choral works and two fun concertos at last join the party. But if Figure Humaine and the Concerto for Two Pianos look like being well positioned in the BBC Symphony Orchestra’s Barbican programme on Saturday, Yannick Nézet-Séguin’s chosen two were the victims of his own success in Prokofiev interpretation.