I’ll have to find out more about the Ophidian speakers, but their cabinet is made in England, and they’re assembled in England too. I’ll have to check on the drivers.
Convert Technologies are designed and built in England. I’ve visited HO and they have a machine that prints and makes the circuit boards, so I guess they’re almost 100% England, bar maybe some raw parts.
As far as made in England or UK is concerned, I’ve never really thought that every single piece has been sourced and made in the UK - there’s always going to be some materials or raw parts that will be imported.