I wonder if the driver wanted to do a Bali Bombin or drive the car into the glass plate window , and accidentially hit the garbage bins. The ambulance driver said that the car was smoking from the inside.
I think that’s a definite possibility... or else they simply screwed up getting their (various?) assets in place for an impending attack.
Another thing to consider IMHO, the other proposed attacked on London bars/nightclubs (Ministry of Sound etc) involved people who had infiltrated these establishments, gained employment at the premises, and got to know both staff and patrons.
There’s a definite change of tactics here, but one of the things on my mind is the possibility of an additional target who was at Tiger Tiger last night, IF last night’s attempt was the real deal.