Even the cold breeze along the Thames played its part in conjuring the chilly, epic Finnish landscapes of Jean Sibelius last night, though Finnish maestro Osmo Vänskä and the perfectly weighted phrasing of the London Philharmonic Orchestra can take primary credit. It’s unusual to have a single-composer programme these days, but Vänskä justified his repertoire with a performance of taut, lyrical and evocative power, which connected and illuminated different areas, historical and generic, of Sibelius’ career.

Arcadi Volodos is a relatively rare visitor to London these days. Although the Russian pianist, 42, rose early to fame, his development has perhaps taken him in a direction that startles those who were initially seduced by the astounding virtuoso transcriptions – many of them his own – in which he initially established his reputation.

This concert was part of a tour of Canada’s National Arts Centre orchestra to five cities in the UK themed around the anniversary of the start of World War One. The Ottawa-based orchestra joined forces with the Royal Philharmonic Orchestra and the London Philharmonic Choir for this London centrepiece to the tour, under the baton of violinist-turned-conductor Pinchas Zukerman.

Pianist Mitsuko Uchida's concentration, calm and grace under pressure are an inspiration. Towards the end of the first piece on her programme, played to a packed Royal Festival Hall last night, the quiet but insistent high-pitched screech of a fire alarm kept going off. Low voices on walkie-talkies at the entrances to the hall were also audible. Whatever the confusion they were sharing with each other, they were failing to lift it.

What Anne-Sophie Mutter is to the violin, Alison Balsom to the trumpet and Sabine Meyer to the clarinet, so is Sioned Williams to the harp. Though Meyer had the glass-ceiling distinction of being the first woman in the Berlin Philharmonic, Williams’s service to the BBC Symphony Orchestra has been longer (nearly 25 years so far as principal harp). And while all four artists have had major new works composed for them, the harpist’s commission of six pieces to celebrate her 60th birthday would seem to be a record.

London homelessness charity The Passage was set up in 1980 and has been growing steadily so that it now provides a day centre, short-term hostel and long-term housing in an effort to help street sleepers get their lives back on track. Its annual "A Night Under the Stars" gala concert is the central event on its fundraising calendar, and assembles an extremely high standard of musician. The evening was compered by Jo Brand and Petroc Trelawny, both safe pairs of hands in their distinct ways.

The first time I interviewed Richard Tognetti he told me a story. Prior to touring the Australian Chamber Orchestra to Japan, the group’s leader and artistic director was discussing publicity with a local PR. Faced with disappointing ticket sales he asked for advice. The response? Remove two letters from the orchestra’s name and transform it into the Austrian Chamber Orchestra – problem solved. It was a tale told with a smile and a roll of the eyes, but one that still had a frisson of Old World/New World truth about it.

Daniil Trifonov, 23, has shot to prominence as one of the hottest pianistic properties of the moment. With multiple competition wins behind him, including the Tchaikovsky in his native Russia, plus a recording contract with DG and a frenetic globe-trotting schedule, he is now a very busy young man. Last night’s London appearance was his recital debut at the Royal Festival Hall, a venue only accorded to the biggest names in the Southbank Centre’s International Piano Series, the new season of which he was opening.

Hector Berlioz knew from early on in life which aspects of death he would want to avoid. He had seen quite enough of the medical textbooks that his father had tried to foist upon him. He had even got as far as smelling the dissecting table as a medical student in Paris, desperately counting the days before he could make his escape into music.

Comparisons, even on paper, between two season openers from London orchestras could hardly have been more instructive. I didn’t attend Valery Gergiev’s London Symphony Orchestra concert last week, for reasons several times outlined on theartsdesk. But quite apart from the fact that Gergiev and his court pianist Denis Matsuev are active supporters of Putin's “Might is Right” campaign in the Ukraine – a situation which tens of thousands of Muscovites are beginning to challenge – Matsuev is also the worst of barnstormers.