Just a thought colin, what would the charges be for a sructure such as this on a pitch as it seems to be getting a bit on the large size ? As it will not be classed as a pup tent or an awning why couldnt we patent them as awning anexes with built in pop up chimney thet way there would be plenty of room to add at least a decent sized area for smokers to congrigate that way the extinguisher in the caravan would be within easy reach. With that you wouldnt need to supply external lighting as the awning light would surfice to read the broad sheet.