The new Ninth Symphony, from the pen of Sir Peter Maxwell Davies, is something of a paradox.  It was commissioned by the Royal Liverpool Philharmonic and the Helskinki Philharmonic Orchestra and is dedicated to the Queen on the occasion of her Diamond Jubilee. And yet it is a round condemnation of the nation’s interventions – called "disastrous" by the composer in his programme notes – in Iraq and Afghanistan.

Bach: Brandenburg Concertos, Sinfonias Orchestra of the Antipodes/Antony Walker, Anna MacDonald, Erin Helyard (ABC Classics)

It’s one thing for UK Border Control to turn Heathrow’s Arrivals into a giant theme-park queue, but it’s quite another when they start messing with our music. Paperwork issues yesterday saw one Japanese and two Korean members of the Amsterdam Baroque Orchestra denied entry to the UK, leaving Ton Koopman and his band too under-staffed to attempt their planned Brandenburg Concerto. Fortunately, soprano soloist Dorothee Mields stepped up with Bach’s Cantata BWV 199, giving us a rather more vocal, but no less Bach-centric evening of music to open this year’s Spitalfields Festival.

What an era for pianists it was in the four decades from 1800 to 1840, the era covered by Murray Perahia’s recital last night. Beethoven, Schumann, Schubert and Chopin all in full verdant flight, selected for a programme of much fantasy and dancing rhythms, in which the translucent, crystalline playing of the American found and told multiple stories.

Michael Finnissy: Second & Third String Quartets Kreutzer Quartet (NMC)

Right, notebooks out everyone. Michael Tilson Thomas began this Berg/Mahler double-header with a lengthy analysis of what we were about to hear in the former’s Chamber Concerto. Whether it was informative or not (and it was), it was a bit of a spoiler. It was nice to know exactly which themes are attributed to which dedicatee, but you couldn’t help but feel the surprises in the work have been somewhat spiked by this little lecture. Still, selected LSO folk and the effective duo of Yefim Bronfman on piano and Gil Shaham on violin were on hand to try and surprise us anyway.

Ask any young composer in this country who is the most important figure in modern British music, and the answer is likely to come back quick and sharp: Oliver Knussen. Himself a composer of dazzling brilliance when he gets round to it, and a conductor who gets far too much work for the peace of mind of those who want him to write more music, Knussen has also for years been a kind of guru figure to generations of young and not-so-young composers, sacrificing his own creative time and energy in their interests, advising, promoting, performing.

Massenet: Werther Rolando Villazón, Sophie Koch, Orchestra of the Royal Opera House/Antonio Pappano (DG)

Serious programmes about classical music are now virtually invisible on the major channels. There’s always BBC Two’s Maestro at the Opera, I hear you shout. Or something with that nice Gareth Malone. A good selection of Proms will be shown live on BBC Four, but with luck will scrupulously avoid the witless interviews with celebs in lieu of proper interval talks. Enough ranting.

There comes a point in almost every great soprano’s career when she tells the world that Tosca, the Marschallin or Isolde be damned: what she wanted to sing all along was The Great American Songbook. This announcement tends to be made - how shall I put this? - later rather than sooner. In Jessye Norman’s defence, in 1987, just five years after her landmark, ultra-luscious recording of Strauss’s Four Last Songs, she recorded a disc of Gershwin, Richard Rodgers et al.