Colin was an enormous influence in my youth and I’d like to share some memories of those days. It was over 60 years ago, on a Sunday afternoon in May 1952, that  I attended a concert performance of The Marriage of Figaro given by Chelsea Opera Group in a school hall in Hills Road, Cambridge. The singers were all young, gifted and sparky. The orchestra purred. The narration (written by David Cairns) was genuinely funny, indeed it seemed bliss to be alive that afternoon and to be young (I was 21) seventh heaven.

Rachmaninov: Piano Concertos 1-4, Paganini Rhapsody Valentina Lisitsa, London Symphony Orchestra/Michael Francis (Decca)

It’s not that Bernard Haitink’s tempos are universally slow, it’s just that they often feel that way. When it works the music can be magisterial, immense, but when it doesn’t you find yourself chafing against such unyielding allegiance to restraint. Last night we saw both sides of the veteran conductor, but a performance of Mozart’s Piano Concerto K453 like the one he conjured with Maria João Pires and the London Symphony Orchestra can banish the memory of any orchestral strife with the merest rococo flourish of its wrist.

The tabloids are getting shriller every day in their warnings about the army of Bulgarians and Romanians about to descend on British shores, so it’s probably lucky that none of their journalists was present last night at the Barbican to witness an Eastern European musical coup of deadly efficiency. Kristjan Järvi and the London Symphony Orchestra may have cleared the path with a little help from Enescu and Kodály, but it was Bulgarian virtuoso performer-composer Theodosii Spassov – playing an instrument no one had ever heard of – who routed us completely.

And so John Adams’s residency with the London Symphony Orchestra reaches its finale – a brisk allegro of a concert with a cheeky coda in the form of the composer’s latest orchestral work, Absolute Jest.

Mahler: Symphonies 1-9 London Symphony Orchestra/Valery Gergiev (LSO Live)

“It looks like the Coconut Lounge,” remarked John Adams as he stepped up jauntily to introduce the first of two big string pieces composed 30 years apart. The folk with their drinks at the candlelit tables, though, were never allowed to sit back and let it all wash over them.

With the cuts still to bite deep, it's enterprising business as usual for both of London’s biggest concert-hall complexes and their satellite orchestras in the newly announced season to come. I use the word "complex" carefully, because as from September, the Barbican Centre, which already has access to LSO St Luke's up the road, will also be using the 608-seater hall constructed as part of its neighbouring Guildhall School of Music and Drama’s Milton Court development.

Want to learn more about 20^th century music in action? Starting tomorrow, you could lose yourself in the labyrinth of the Southbank’s year-long The Rest is Noise festival, and plough your way through Alex Ross’s monumental but partisan study of that name. Or you could learn a lot in a short space of time from John Adams’s mini-residency with the LSO at the Barbican.

Valery Gergiev’s exploration of the music of Karol Szymanowski is one of the most vitalising series mounted at the Barbican in recent years - to compare, say, with Sir Colin Davis’s Sibelius and Berlioz, Michael Tilson Thomas’s tributes to Leonard Bernstein, or Gergiev’s own Shostakovich and (increasingly) Prokofiev.