José Mourinho is Setúbal’s most famous son. Non-Portuguese readers are not expected to know the two other celebrities most feted by this extraordinary port city on the estuary of the River Sado, with miles of sandy beaches opposite where a school of dolphins resides and the lush national park of the Arrábida mountain range just to the west.

Pure, unorthodox genius: the terms apply both to the three works on the Belcea Quartet’s programme – Haydn at his most compressed, Britten unbuttoned and sunny, Shostakovich hitting the tragic heights – and, if the term “genius” can be applied to re-creative artists, to the players themselves. Corina Belcea could surely have as big a solo career as violinists like Julia Fischer and Lisa Batiashvili, but she chooses to work with equally committed colleagues Axel Schacher, Krzystof Chorzelski and Antoine Lederlin in what is by and large a greater, wider repertoire.

Night life in the Square Mile, at least from the perspective of my evening routes around the Barbican, is dominated by booze and sportiness. The way to last Thursday’s concert was blocked by a Bloomberg relay marathon, and cycling through the tunnel towards Milton Court yesterday evening, I encountered the bizarre spectacle of carnival-style trucks pedalled by a dozen drinkers apiece, sitting at a central "bar" and already well oiled.

Britten: Les Illuminations, Variations on a theme of Frank Bridge, Serenade Barbara Hannigan (soprano), James Gilchrist (tenor), Jasper de Waal (horn), Amsterdam Sinfonietta/Candida Thompson (Channel Classics)

You’d not expect Einstein to have daubed Amadeus’s Ninth Piano Concerto with the label “Mozart’s Eroica”. The really famous one didn’t : that piece of punditry came not from Albert the Great but Alfred the (musicologist) Lesser. Embarrassingly, the OAE’s publicity didn’t seem to know the difference. Anyway, by advertising this concert with Alfred’s tag at its head, the intention was surely to highlight the shock of the new in all three works played and/or conducted by András Schiff.

Mozart and Wagner were the opposite compass points of Richard Strauss’s classical-romantic adventuring, and Amadeus has often made an airy companion to the rangy orchestral tone poems in the concert hall. By choosing Haydn instead as the clean limbed first-halfer in two London Philharmonic programmes, Yannick Nézet-Séguin came armed with period instrument experience of the master’s symphonies in his dazzling debut concert with the Orchestra of the Age of Enlightenment.

Why is music? A child’s question, a great question. One answered by Evgeny Kissin’s piano recital at London’s Barbican Centre last night, where you might want to engage analysis and come up later with answers but what happened was that you left the concert hall feeling more alive, emotions retooled, spirit lightened, range widened. Music is because. Why else would Beethoven compose 32 piano sonatas? What possible purpose of Haydn to write 62 of them? Because.

The Vienna Philharmonic Orchestra can play Haydn’s last symphony - No 104 “London” - in its sleep but that is not, I hasten to add, the impression one wants to take away from any performance of it and especially not in the city that inspired it. The music tells us that Haydn had a rather better time in our capital than Bernard Haitink would have us believe but this rather dogged account on the penultimate night of the Prom season seemed to suppress the work’s genial good humour and pre-empt most of its surprises with a one-size-fits-all approach.

Beethoven for All: Symphonies 1-9 West-Eastern Divan Orchestra, Daniel Barenboim (Decca)