Right I am at a petrol station waiting for adrenalin to subside.
made very slow progess with 6 car mats and moving forward 4ish inches at a time. Rather monolithstongehenge-like with mats instead of cylindrical wooden poles! 
After about 20 mins of a mom came home amd dragged Zac Efron and his 2 mates out the house to help!
One kindly offered the fact that they'd pushed another car out the road a few days before. "Oh, yeah, what kind of car?"
"A peugeot 205" he gulped, looking at my Galaxy.
Another kind stranger joined in after I suggest the mom should get behind the wheel as she waa slight and I am fat not.
So, I'm free, and now have a mystery to solve: why was there a john lewis paring knife hiding under the rear mats in my car?
Doesn't belong to the Chaoses. 
Anyway every cloud has a silver lining - I don't think I'll be asked to play I Spy again in a hurry.
Thanks all you lot for your help - your advice was invaluable - it was the mats that did it.