Reading this about Matrix Churchill took me back, they were involved with the Super gun weren’t they? I was on part time traction for a company out of Teesport for Ferrymasters and MAT at the time and often would drop or pick up trailers from shed 5 which was used partly for customs. On that particular day went to drop trailer in shed and stopped by security " can’t go in there mate" could see that something was going on as every man and his dog was there . The load of pipes had been impounded think they were written down as oil field pipes, but they were highly polished , not your average piece of pipeline. Was on a night job a couple of days later and had a quick look at aforementioned pipes ( no security about) and having worked in the oil industry those pipe sections were special !!