Nasuf

Hello,everyone.I just like to know if speedcurb cameras in Sydenham hill can monitor front and rear facing at the same time as I was driving down to Forest hill and there is one but it is on the opposite side of the road to me facing forwards and I saw a single flash,but I've heard that they wouldnt flash front facing.The speed limit is 20 but I think I was 30mph.Do you think the camera caught me? Thanks