In the year of his 85th birthday, and his 60th season as a conductor, Bernard Haitink is hardly taking it easy, with concerts with various orchestras around Europe and the US including an appearance at the Proms. In this visit to London with the Chamber Orchestra of Europe he may not have been bounding up the steps to the stage, but his powers with the baton remain undimmed.

A voluptuous dream in sequined silver, the nearly-27-year-old Georgian pianist Khatia Buniatishvili sat down at the keyboard and instantly transcendentalised her mermaid look as Ravel’s Ondine. Even Brahms took to the life aquatic of her recital’s first half. For the second, though, there should have been a costume change into a clown suit with a tatty tutu pulled over it.

"Finally,” said Sir Simon Rattle, “I get a chance to say thank you. We have had forty years working together without an argument." The Royal Philharmonic Society was awarding an Honorary Membership to Martin Campbell-White, Rattle's agent. Campbell-White, who has been a guiding influence on the conductor's career since the 1970's made a rare appearance on stage, as he became the first artist manager ever to win this award in the RPS's 201-year history. 

The rapid rise of Dutch baritone Henk Neven is easy to explain. He is blessed with instant charm and the voice, still attractively youthful in his late 30s, emerges full-toned from his slight frame with a faint, fast vibrato that lends it a distinctive tang. The Neven sound is sturdy rather than flexible, which may help explain why the first half of his Wigmore Hall recital was more satisfying than the second.

This was smart programming. The final night of London's Lufthansa Festival of Baroque Music presented the forces of the Göttingen Ha(e)ndel Festival.

It’s safe to assume that mischievous Monsieur Poulenc would have been delighted by the juxtaposition of his joyous slice of Surrealism with Fauré’s serene masterpiece the Requiem. What his elder compatriot might have had to say is harder to imagine. Since Les Mamelles de Tirésias was conceived for the opera house and the Requiem for a place of worship they don’t even belong in the same building – and neither of them by rights in a concert hall – so to call them an odd match would be an understatement.

No quibble about the result. Pianist Martin James Bartlett deservedly became BBC Young Musician of the Year 2014 at Usher Hall in Edinburgh last night. The 17-year-old, a student at the specialist Purcell School in Hertfordshire, and at the Junior Department of the Royal College of Music took the title with a very strong performance of Rachmaninov's Rhapsody on a Theme of Paganini. He was watchful, alert to every nuance, playing idiomatically, and with a very convincing sense of the shape of the piece right through to the final pay-off.

Antonio Pappano addressed the audience before the start of the concert to explain the thinking behind this rather unusual programme, first performed in the early nineties and now a perfect fit for the Accademia Nazionale di Santa Cecilia orchestra and chorus, where he has been music director since 2005.

Part of the Birtwistle at 80 series at the Barbican, this not-quite-semi-staged Gawain ended up being held back a little by its shoestring production, where a straight concert performance might have transcended its limitations.