The loss of the music course is a real shame indeed.
However, a music course at the uni is not essential for ensembles to exist. There is no music degree at Warwick but there is a very active programme of ensembles – DD and I spoke at length to an active member about it at the open day.
And in fact if there is a strong music dept, being in the ensembles can be daunting for non-music students – friend of DD's was at Brum (not studying music) and found that their grade 5 instrument was not good enough. Not that that is a reason not to have a music dept obvs; more like a reason to have specific ensembles for those not studying music.