Might be the same guy I saw a couple of weeks ago on the M56, but this was roof mounted bikes on a people carrier. He pulled out in front of me and it was perfectly clear that one bike still wasn't attached properly. As we moved into middle lane that bike fell sideways (thankfully towards other bike on roof) but the goober seemed happy pootling onwards reagrdless. As we passed him I gave a hand gesture that suggested his love life had been rather poor and a finger pointing upwards just to make sure he knew he was going to loose some cargo. He stopped again, and I didn't hear anything that day about the M56 being closed at all.
(People in glasshouses etc, had a similar problem last time I was out, got a new frame and a Thule rack that clamps the downtube, so I think I'm a bit concerned about damaging the downtube and not tightening the clamap enough. Mate isn't concerned about bike damage so he just wound it up and got it secure!!!!)