After finding out the black shiney surface was infact bullet proof black ice I elected a bit of traction control (aka sliding) into a parking bay which would be a bit safer. Parking beside a vehicle that has not been stationary for at least 30 minutes is not the best place to be on black ice, they tend to move as the tyres cool.
Well I found out that even with this knowledge it still gets the smart arse in the BX

I was sure I was closer to that white line than that

Ah now that bit of snow was not pushed by my parking

This from Monday after spending a day in the sunshine this was the boarder of the murk and rain I went home to just 2 km from where I had parked.