DASHCAM - Motor Parts Direct Van - Registration No: LB70 MHK. Driving VERY erratically through Southampton this morning. Changed lanes in front of me, with zero warning, then slammed brakes on, causing me to brake hard, because they failed to judge the stopped traffic in the lane they were in. Clearly not paying attention and had I been a few feet further forward, they would have crashed into me. Then moved into the right hand lane, only to move back into the left hand lane a second later. Dashcam footage showing appalling driving. Either way, this driver needs to be reminded that his impatience and lack of attention could lead to someone being injured or killed. Motor Parts Direct informed.