The concert we were going to go to is cancelled (was Wigmore Hall thing). So we have babysitting & an empty evening, plus an urbane visitor to entertain.
Does anyone have an instant idea of something we should see instead? - cerebral music probably being the preference. (I see that there is some Messiaen in W'minster Abbey - we're not quite ready for Messiaen again yet - and some Haydn, Beethoven &, er, Berg at QEH. I am not convinced re Berg (have recall of a review which described an audience as "whippet-faced Berg lovers, straining after every cacophonic cadence").
But I am open to persuasion on both ... (or on something other than music, of course)