a tonne of concrete? that's about 0.5 cubic meters of the stuff. i saw the vehicle yesterday; there's neither massive body deformation nor broken glass.
for that rendering to be correct, they will have to strip the white paint off the building at the southwest corner of the intersection. about 20 meters south (at Britain Street) there's a red brick building that matches the colour scheme.
too much effort?! methinks the frequency in which you need to attend the facilities is of far greater import than the tiredness of having to push a hinged panel aside many, many times per day.