Motorcycles in your bus lane

no wing mirrors is no excuse, half the cyclists can't and don't check over their shoulders,
why are you leaving so much space on your inside?? if a motorbike can get between you and the curb then you check your road position

I occasionally like to ride in a position which allows me to avoid grids and potholes. This happens to be close to the centre of the lane. Where would you suggest I position myself in this scenario?