These cars are all driving the wrong way down the one way bit of Nugent Hill
Why? Well, how else do you get from Kingsdown to Gloucester Road when Cotham Brow is closed.
Indeed, two days later, the no-entry signs at this end (and the one-way signs at the other) were taped over. so when there were head-on conflicts such as happens below, both sides would feel they were wronged..
Perhaps then, just as bike lanes follow unofficial cycling routes, these motorists are leading a way in defacto actions which will eventually be authorised.