Opera can take many forms and fulfil many purposes: this chamber opera by Zakiya Leeming and Sam Redway is about vaccination. Based on history, it has a story to tell and lessons to teach.

Two concerts in the BBC Philharmonic’s series in their own studio form the climax of studies at the Royal Northern College of Music for a small number of soloists on the postgraduate International Artist Diploma there, and also for some young conductors on the master’s course run by Mark Heron and Clark Rundell.

The opening and closing concerts of a season tend to be statements of intent – to pursue a path of exploration or (latterly) to celebrate a destination attained. John Storgårds’ final programme of the BBC Philharmonic’s series at the Bridgewater Hall was definitely the latter of those.

Pete Shelley’s departure from Buzzcocks felt abrupt. When he left the Manchester band which had been integral to British punk since 1976, the other members thought it was still a going concern. Shelley had reached a different conclusion.

Manchester Camerata spent eight years performing and recording a complete edition of Mozart’s piano concertos with Jean-Efflam Bavouzet as soloist, together with conductor Gábor Takács-Nagy, and inevitably there was the question: what next?

Huw Watkins’ Concerto for Orchestra, the fourth new work of his to be commissioned and premiered by the Hallé and Sir Mark Elder, is another beautifully crafted and highly appealing construction.

It’s also intriguing in its game-playing with genre, in almost a mirror image of the way his First Symphony was back in 2017. That, a two-movement piece, was undoubtedly symphonic by the time it reached its somewhat surprising ending, but managed to give the impression of being a concerto for orchestra at many points along the way.

There was a change of conductor from the one advertised for this BBC Philharmonic performance at the Bridgewater Hall – but the one who we heard from was an interpreter of extraordinary vision and intensity. Yoel Gamzou is also a composer in his own right, and a Mahler specialist, it would seem: he’s made his own completion of the Tenth Symphony, so he’s no doubt as aware of the language and creative imagination of that other composer-conductor as anyone.

Kahchun Wong returned to the symphony with which he made his first big impression conducting the Hallé – and made a big impression with it again.

It’s quite ironic that the Royal Northern College of Music should have invited, as director of this, Britten’s avowedly pacifist opera, Orpha Phelan – whose version of his Billy Budd for Opera North nearly 10 years ago contained one of the most thrilling battle scenes ever staged.

The BBC Philharmonic took its Saturday night audience on a journey into French sonic luxuriance – in reverse order of historical formation, beginning with Duruflé, continuing with Chausson and ending with Saint-Saëns. It was conducted by Geoffrey Paterson and featured Dame Sarah Connolly as mezzo-soprano soloist, neither of them the artists originally announced, but 100 per cent good value as their substitutes.