[nick n]

ACS?
 
I'll have to look those up.
 There's also the infamous PWB ( Peter W Belt ) headphones from days gone by, of which I have some fine examples. Wharfedale still makes a few but nothing that says BUY ME.

 

[Head1]

KEF
 
NAD - British origins, Canadian owned
 
The lead acoustics engineer for Philips Fidelio is english, judging by the accent. 

 

[mfolkerson]

Not an audiophile, but just google searched for UK earphones and this thread popped up. I actually just created an account on this site to point out RHA, who are British (Scottish actually I think):
 
http://www.rha-audio.com/uk/
 
Have just ordered the MA350 (cheapest at £30, said I wasn't an audiophile didn't I?), so not sure on quality yet, but just thought I'd point it out.

 

[god-bluff]

Musical Fidelity (manufactured China or Taiwan) been and GONE

Quad are to release their first headphones; the planar (not electrostatic?! ) ERA1

Would love to see companies like Spendor get into this market.