Boris has resigned his Parliamentary seat or so it seems, however he has already seen the report from the standars commitee, so it would seem the answer to the title of this post is both, he fell of his own violition just before he was pushed.
His resignation containes the usual mix of obfuscation and concpiracy theories worthy of Trump himself, the real pity is has taken this long to see Borises true colours and now after him dragging us out of the EU to further his own ambitions the people of this country now realise that leaving the EU is not the panacea it was claimed to be and as a result our economy will continue to suffer for years to come.