“How many times have you heard the conductor sing?” asked William Christie after the final number, but before the two encores, of Sunday night’s 40th birthday celebration for his ensemble Les Arts Florissants. Well, lovers of old recordings know that you sometimes get plenty of impromptu vocalisation from the likes of Bernstein and Barbirolli.

Donnacha Dennehy: The Hunger Alarm Will Sound/Alan Pierson, with Katherine Manley and Iarla Ó Lionáird (Nonesuch)

Handel’s Brockes-Passion is a curious piece - sacred but not liturgical, and with a strong influence from opera, though it is a concert work. Solo voices predominate, and the singers assembled at Wigmore Hall were mostly fine.

It was said of the Venetian audiences randy for the satirical antique of Handel's first great operatic cornucopia in 1709 that "a stranger who should have seen the manner in which they were affected, would have imagined they were all distracted".

Human sacrifice has a disconcerting and wonderful effect upon great composers, above all when it involves the supremely queasy issue of a father vowing to offer up his child: think of Britten with Abraham and Isaac, Mozart with Idomeneo and Idamante, Gluck with Agamemnon and Iphigenia, and here Handel with Jephtha and Iphis in his last oratorio.

Cut almost anywhere into the lesser-known seams of Handel’s oratorios and you may strike plentiful nuggets of the purest gold. It may not be quite the case that Handel's Belshazzar, its score studded with nearly-forgotten musical treasures, has entirely disappeared from view.

Flirtations and fragile alliances, lies, betrayals, schemes and the ever-present promise of sex – Love Island may be back on our screens next week, but it has nothing on Handel's Agrippina. Imperial Rome is the backdrop for one of the composer’s most deliciously cynical comedies, where love is an afterthought and power is the only game in town.

Louise Alder, lyric soprano of the moment and vivacity incarnate, had yet to be born when John Eliot Gardiner made his first recording of Handel's Semele with the Monteverdi Choir and English Baroque Soloists in 1981.

Whips, scourges, sinews, blood and pus: where Bach’s two Passions lament from a contemplative distance, Handel’s plunges right to the bone, to the cruel, tortured death that is the heart of the Easter story.

For the final, and only UK, date of his Vinci Arias tour, virtuoso countertenor Franco Fagioli gave an animated and arresting recital of baroque arias at Birmingham Town Hall on Sunday afternoon with the Italian period instrument group Il pomo d’oro.