Police. Placards. Protests. And bag checks. It meant only one thing. Jews were performing at the Proms. Here we were in the Royal Albert Hall in London in 2011 witnessing a stage of musicians being barracked and abused for having the gall to be Jewish. Last year, four more Jewish musicians, the Jerusalem Quartet, had the cheek to perform and broadcast a recital at the Wigmore Hall. They were again heckled and hounded off air. No, not a portrait of Europe in the early 20th century, but Britain in the 21st. I wonder.

Over the past six weeks of the Proms the BBC’s hard-working Symphony Orchestra has performed everything from Britten to Brahms, Verdi to Volans. Their Mahler with Ed Gardner was an operatic epic, their programme of English music for Mark Wigglesworth glowed with wit. Yet hearing their ragged and unlovely account of Beethoven’s Ninth Symphony last night it was hard to remember their triumphs, hard even to remember the delicate account of Graham Fitkin’s new Cello Concerto that they delivered in the first half, so complete was their collapse.

David Fray certainly has the locks to be a piano virtuoso (eat your heart out, Franzi). And he has the looks, the troubled brow, the pallor and a suitably eccentric manner (the Glenn Gould hunch and hum came out for all the runs). But does he have the hands?

Hooray for Hollywood! The title of last night's Prom didn't officially have an exclamation mark. But if any concert deserved a screamer, it was this one. A delirious mutual enthusiasm pinged back and forth from stage to audience all night as the slick John Wilson Orchestra and its eponymous chief (with excellent vocal support) romped through the highways and byways of the golden age of the American musical.

Mendelssohn loved looking back. And nowhere more so than in his blockbuster oratorio, Elijah. But what was most striking about last night's monumental performance at the Proms was how much he was also clearly looking forward and outward, and how feeble an appellation oratorio seemed to be for what we were witnessing. We were being bombarded with pre-echoes of the adventure-laden Hollywood epics of the 1950s. We were being hit by a microclimate of such unstable energy that it could easily have registered on the Beaufort Scale. Prototype movie. Tropical hurricane.

Twelfth-century abbess, healer and mystic Hildegard of Bingen had no formal musical training. Perhaps because of this her music – exquisite arabesques of chant melody, animated by the conviction of her religious beliefs – creates a language all its own, a “swaying bridge between heaven and earth”, as she characterised it.

The spectacle of an orchestra named after Mahler playing Stravinsky irresistibly calls to mind Stravinsky’s report of a performance of the Eighth Symphony in Zurich in 1913. “Imagine”, he wrote to Maurice Delage, “that for two hours you are made to understand that two times two makes four.” Oddly enough, repetition is the lifeblood of Stravinsky’s own music, though he rarely makes two times two equal four, and his symphonies don’t last two hours (nor, incidentally, do Mahler’s).

Having been away in remote mountain places, I hadn't heard that the BBCSO's chief conductor Jiří Bělohlávek was taking a month off to recover from a virus. So it was a bracing last-minute shock to find the man stepping up to the podium to conduct Wagner's Meistersinger Prelude not the orchestra's wise Hans Sachs but a Walther von Stolzing in conducting terms, tipped unexpectedly by one source outside the BBC as Bělohlávek's successor. Lean and hungry Dane Thomas Dausgaard masterminded the most brilliantly co-ordinated Prom I heard last year, and he excelled again last night. As the programme's central cabinet of curiosities did not.

Sirs Harrison Birtwistle and Peter Maxwell Davies have now been at each others’ heels for almost 60 years. First, the composers were students together at the Royal Manchester College of Music. Then, once their careers began flourishing they kept rubbing against each other in concert programmes. Inevitable, really: the same organisations commissioned them; they were the Twin Peaks of British Modernism. Even now, for old times’ sake, the pair can’t escape each others’ shadow.

"O, reason not the need!” cries Shakespeare’s King Lear, insisting on certain unquestioned rights. The phrase came to me listening to Bernard Haitink conducting Brahms’s Second Piano Concerto and Fourth Symphony last night. The 82-year-old Haitink does not question the need for this music - and I’m not sure that’s entirely right. I want the imperative there, I want to feel the urge to be born in those musical paragraphs that Brahms wrote with such generous largesse. To reason the need gives the music its birth again.