As each case turns on its own facts and we don't know the distances and spaces referred to in the 'Ali' case it would be a gamble.
But as I understand the thrust of this argument, the point being made is one of driver competence, or rather lack of i.e. they didn't stop in the box because of a stationary vehicle, they stopped in the box because they're a poor driver who doesn't know the length of their own vehicle who had stopped because they thought they were clear. Had they known they were in the box, they'd have moved forward and had the space to do so.
OP, could you bolster this e.g. their normal car is a Smart car and they were driving this just for a day etc!
As regards whether the car in this case could have moved forward, probably. But they're cars, not sardines. Also, how could the driver be such a good one at the front - squeezing forward - yet at the same time bad at judging where they were at the back?
If you're taking this line, think it through to its conclusion.