Depends on where i am riding tbh. Mill Hill areas in morning or evening rush hour or when the dopey mums are on the run in their 4x4s its almost every 5th vehicle that will go for me. In that area road marking, lanes and traffic lights mean virtually nothing to the locals as they believe in only one thing... Might Is Right.
Whoever has the bigger vehicle/balls will win the road space and everyone else just isnt worthy in their eyes.
In Kingsbury area its about every 10th car, mainly cos they window shop as they drive and think their mirrors are simply aerodynamic aids on ther doors