Well I saw some attrocious driving last night. Someone in front of me was speeding up, slowing down and appeared to be either lost or drunk. 16 in a 40 then up to 20 in a 30. Hesitating near junctions which made me think they were looking for a certain road. When we got to a large roundabout they straddled both lanes before indicating right and then turning right at the roundabout and driving round it the wrong way. This is normally a busy roundabout but there wans't anything on it this late at night. It's a junction for the A3 so it has slip roads with people going fast on it and no visibility over the roundabout. I flashed them and beeped my horn repeatedly to warn them but they briefly hesitated and then carried on driving the wrong way. Hopefully they didn't meet anyone coming towards them.