[Darren69]

If you can't generate any pressure in the system by pulling the lever then
leaving it pulled overnight will not work? I think that's a myth and one that would only work in certain circumstances. It will only work if you have some pressure in the system, if you have none then it will do nothing.Your best bet for quick air removal is to bleed it from the master cylinder end using the banjo bolt at the master cylinder end or as fitted to some later masters the bleed nipple that was fiitted with this in mind. Otherwise it is easier to reverse bleed as air will more easily travel up than down.