Julian Anderson’s 50^th birthday this year was the prompt for the latest of the BBC’s Total Immersion days, devoted to the work of a single contemporary composer. I have long been a fan of Anderson’s music since hearing the marvellous Khorovod in the 1995 Proms, but, after a couple of recent blips – I was not so keen on the opera Thebans or the recent Piano Concerto – I was ready to have my admiration re-awakened. And, in large measure, it was.

On paper this was a fairly austere piece of programming. No variety in composer, genre or style, just four Bach Partitas in a row, works of similar approach, length and technique. And yet in performance, in the hands of Angela Hewitt, there was sufficient variety, not to mention poetry, humanity and wit, to make for a completely satisfying recital.

The Royal Festival Hall rather belied its name for a visit to London on Saturday of France’s premier new-music ensemble. It can’t be helped that the more intimate space of the Queen Elizabeth Hall next door is presently closed for renovation, but with the balcony and back of the stalls both empty and unlit, the place presented a more dismal aspect than usual.

Now we know who sent Jonas Kaufmann the Union Jack boxer shorts for the Last Night of the Proms. Whether the sender’s identity is the bigger surprise, or the hint of ambiguity over whether the "Greatest Tenor in the World" had previously heard of one of Britain’s favourite baritones – well, you decide. And no, we don’t learn who threw the knickers at him from the arena.

Dances of earth and songs of sea – the BBC Symphony Orchestra's latest programme offered an inspired coupling, where similar inspirations balanced contrasting styles. In a gritty first half, Birtwistle’s Earth Dances played out over a continuous 40-minute span of uncompromising modernism.

"Mitsuko Uchida plays Mozart" might have been the marketing tag to sell out this first concert in the Scottish Chamber Orchestra's 2017-18 season (despite student and free under-18s take-up, the Usher Hall still wasn't full). "Dvořák Symphony No.

What has 12 hands, 18 legs, 176 keys and two page-turners? Party night at the London Piano Festival, of course. The six-pianist, two-piano marathon on Saturday evening was a high point of this delectable four-day event – though far from the only one.

Apparently it was Mirga Gražinytė-Tyla’s idea to invite Jörg Widmann to be the City of Birmingham Symphony Orchestra’s Artist in Residence this season – indeed, according to backstage rumours she made the phone call herself. If that’s true, it’s a hugely encouraging bit of intelligence.

What pianist wouldn't long to lay fingers on keyboards impregnated, as Roman Rabinovich put it in his introduction yesterday afternoon, with the DNAs of Haydn and Chopin?

They say that Wigmore Hall audiences know their Lieder singers, but last night's far from packed house dispelled that illusion; the hall has been full for much lesser artists than German soprano Anne Schwanewilms. No matter; she gave her usual masterclass, ineffably poised between tone-colour, phrasing and word-pointing.