UK Volunteer Gliding Sschool – Fire Fighting Provision

Hello

Does anyone know what facilities do the various VGS site have in case of accidents? I know that some schools are located on mainstream sites like Linton upon Ouse and RAF Odiham, who have excellent RFFS facilities. But what about those schools located on fairly inactive like Halton, RAF Little Rissington and RAF Kenley? I hear they are only provided with a single 90Ltr foam extinguisher bolted onto a trailer?