Started to clear out the bus today, removing the camper units and seats for a good old clean. Thought i should check on the spare time and removed it and discovered the bus came with this little pond in the spare wheel well. Looked like primordial life was begining to form, but fortunately was not yet rusting through. Anyway drained the swamp and now more at ease with my decision to stick the spare on her nose. Did not dare do a full anaylsis of the 'fluid' but reckon its just condensation rather than a leak. Just goes to show its always good to check all those nooks and corners for general nastiness!