[QUOTE=chipsncheese 2: The only car that we (ATC) have at our disposal is an 'S' reg Ford Fiesta, with no markings, or orange lights. Not likely to be much use on an active runway full stop. Never mind one covered in a blanket of snow.....

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Perhaps I am being remiss in lumping everyone under the banner of ATC. Sorry. But you, as do all, obviously know that LJLI has more than an S reg Fiesta at its disposal.
But you have answered the whole issue really ..."never mind one covered in a blanket of snow"
Why do you think the other dozen or so aircraft waiting to depart called it a day?