god forbid that the undertaken vehicle moved across and there was a collision
Which is exactly why I ensure the hard shoulder is clear, so I have somewhere to go if it does happen. Obviously if the motorway is otherwise clear then an L3 overtake is the correct and safer option, but whenever I use motorways it seems to be 3 lanes full of cars moving at steady speeds with relatively low speed differentials and sub 2-second spacing, so there isn't a clean route to overtake. If my lane happens to be moving a bit faster than the lane on my right I'm not going to worry about it.
