Lambert........Lambert / Viscount / Trusty /Yamaha with some viking thrown in
Blimey, it's a bit murky They made lugged frames in a Viking Factory but decided to make all welded frames of aerospace material....nothing wrong with that but were renamed Viscount ( in my era) who made the frames, hubs, bottom bracket and everything else including the alloy forks which broke ( death forks).......eventually Yamaha stuck some money in and replaced the forks but the world and UK economy wasn't bike mad so died.........
They made bars with their name on them but were a bit flakey....
Last time I saw them was the 1978 UK show.......lots of stuff a few years ahead of it's time but no money or economy to carry it through.
Lots on Google
Shaun