The B-listed Glasshouse's future had been under review , and a feasibility study was completed by the Glasgow Building Preservation Trust (GBPT). Read More: Glasgow's Queen's Park Glasshouse to close in AugustThe petition will be heard by councillors in Glasgow on Thursday, with hopes that the closure can be averted. Campaigners are also raising concerns about reports that the Council is already in discussions with a potential external tenant (Image: Colin Mearns)Campaigner Claire Hastings said: “More than 12,000 people have signed our petition because they don't want to see Queen's Park Glasshouse disappear from public life. The Glasshouse has been in use, though, and there are limited areas of public access at the moment. "Our staff at the Queen’s Park Glasshouse have been advised of the situation and we are working with them to ensure all colleagues are redeployed to other parts of the parks service.