The mysterious tarpaulined object of Shardeloes Road

BCer The Old Trawlerman wants someone to put him out of his misery. He writes:

This mysterious tarpaulined object has been on Shardeloes Road for a couple of months now. Anyone have any idea what it is? Vehicle of the future? Inflatable rubber pasty?


Ian has taken this shot of the mysterious object uncloaked. Still none the wiser: