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.

There’s always a bit of a buzz around a premiere, even one which may seem slightly off-the-wall. Jan Sandström’s Echoes of Eternity is a concerto for two solo trombones – unusual in itself, given that there are precious few concerti for just one solo trombone – and symphony orchestra. Add to that the fact that one of the soloists is also the conductor and it’s easy to see that this piece is beginning to get complicated.

For the couch-bound classical music lover, keeping up with the Proms is pretty straightforward. Step one: open bottle of agreeable claret. Step two: turn on Radio 3 and listen, or watch selected Proms on BBC Two or BBC Four. Or, indeed, catch up on the iPlayer. But needless to say, there's a colossal amount of work going on behind the scenes to make it all happen.

Heading up this month's classical selection is a 16-CD budget box set of the complete works of Frédéric Chopin, issued to celebrate the 200th anniversary of the consumptive Pole's birth. Plus we review a rare piano concerto by Ralph Vaughan Williams, a disc of even rarer string orchestra works by the post-war Polish composer Grażyna Bacewicz, a fresh coupling of the Debussy and Ravel string quartets, a new version of Bruckner's mighty Eighth from the French-Canadian wunderkind Yannick Nézet-Séguin and two sets of historic recordings conducted by "Glorious John" Barbirolli.