A vital cultural venue
Oh a more 'fun' note, I have used Clair Hall for many different reasons including barn dances and NCT sales. I took my little boy to see an international ballet there and we just couldn't believe that such a wonderful, prestigious event would be held in Haywards Heath - indeed, if it was not at Clair Hall there would have been no other suitable, central venue for such a performance. He and many other adults and children would have missed out on an enjoyable, educational cultural event as it would be too far and undesirable to travel elsewhere. I have also attended charity events (such as the Popsteps annual Christmas party) that would not be feasible elsewhere but which have raised thousands of pounds for charity.
The main point is that Clair Hall is the largest venue that is central to the town - central sussex college is absolutely not central in Haywards Heath, and no other suitable venue exists. You are building many more homes in the area and it is laughable that such a significant town does not have its own active cultural venue.