We have taken the opportunity to visit Leamington in Warwickshire which has a very similar example of the MacFarlane 224 bandstand. Its starting to show its age a bit and will need some restoration in due course but at least it has a roof! There is maybe an opportunity to share experience in our mutual interest.
The Leamington bandstand has some external lights and the circular detail has some resemblance to cast iron features around swanage. It also appears there might have been some track arrangement for drapes around the perimeter which might have been for weather protection or security.