Gone, it seems, is the era of epic three-part Proms. Sunday afternoon's programme, partly billed as a children's hour, might have pleased pianist and pundit Stephen Hough, whose recent broadsheet plea for shorter concerts somewhat overdid the need (lunchtime events already cater to concertgoers in a hurry very well, and the Proms has its late-nighters too). But it left many of us wanting more, not just of Ravel in the second half but also of the distinctive Simón Bolívar earthiness, which was given free rein only in one spirited encore.

More than just a great and serious pianist, Leif Ove Andsnes is a Mensch. His special gift in recent years has been to bring young musicians just establishing their careers together with star players like himself in beautiful and/or interesting places. I feel privileged to have heard him and his juniors in a programme of rare Sibelius melodramas in Bergen, Kurtág and Liszt in the main room of Grieg's humble home at Troldhaugen, and two shared recitals linked to the revelatory exhibition of little-known Norwegian artist Nikolai Astrup at Dulwich Picture Gallery.

It’s impossible to get the measure of the Cheltenham Music Festival in just one day. Lasting more than a fortnight, this is the festival that made the running in postwar British music: that helped put Malcolm Arnold and Robert Simpson on the map and defined a genre - the “Cheltenham Symphony”. Times change and financial pressures increase, but under the artistic directorship of Meurig Bowen, Cheltenham is still a powerful (if undervalued) force in contemporary classical music. Of the 120-odd composers in the 2016 Festival, at least one third are alive.

After a grey start, there was a spectacular sunset around midnight on the second of my two days in Reykjavik. It's what brings one of Iceland's most brilliant younger-generation talents, pianist Víkingur Ólafsson (and yes, he's worked with Björk), back to his homeland every June. He launched Reykjavík Midsummer Music in 2012, the first full year of programming at Olafur Eliasson's ever amazing Harpa concert halls and conference centre on the harbour.

It should have been a complete disaster. Not announcing your festival’s programme until barely a week before it started ought to have guaranteed that nobody knew about it – no press, no audiences, other plans made, other things booked.

But still they came. It’s testament to the Cottier Chamber Project’s now firmly established place in Scotland’s summer musical life – this is its sixth year – that even keeping audiences in the dark as to what was planned didn’t deter them.

Ibert: Orchestral music Orchestre de la Suisse Romande/Neeme Järvi (Chandos)

“Bon soir, good evening! Nice to see you! To see you...” Four years after bidding an emotional farewell to the Usher Hall, the Gallic charmer is back, maybe slightly stouter, with a tinge of grey in a new beard, the great mop of curly red hair as unruly as ever. And that accent! As the anecdotes flow, stout middle-aged Edinburgers swoon as they imagine themselves drinking pastis on the Boulevard St Germain in the spring sunshine.

London has been missing out on Boris Giltburg for too long. He's been playing Shostakovich concertos back to back with Petrenko in Liverpool, and the big Rachmaninov works up in Scotland (see theartsdesk's review today of the latest Royal Scottish National Orchestra programme).

In 2007 Maxim Vengerov had to withdraw completely from violin playing, and stayed away for four years. He had suffered the after effects of a weight-lifting injury to his shoulder, and needed surgery. But he also described at the time that he felt he needed to re-learn the instrument. If people – like the writer of last night's programme introduction – now refer casually to his “effortless virtuosity”, it is clearly something which has been acquired with an intense effort and sense of purpose. 

Renée Fleming recently announced her imminent retirement from the opera stage. But she has no plans to stop performing, and will instead devote her time to recitals and concerts. Yesterday’s excellent performance with the BBC Symphony Orchestra bodes well for her new career focus. And she’s not one to rest on her laurels, here giving UK premieres of two new works written for her voice, ever the adventurous artist, always playing to her strengths.