BB Photonics was listed as New Jersey based when PoET bought them, so that is the historic anchor reference point. However, the address at 2 Highview Dr. is a residential address and was Bill Rings old home address (head office was in the basement). Bill's other company, Wsr Optical Device Solutions, was also listed at his home address. The company now lists itself as a subsidary of PoET Tech and the address is listed as 120 Eglinton Ave E in good old Toronto.
As to the UK connection, Bill Musk, another of the 3 principles of BBP, still lives in England and works out of the Plymouth University's Brixham Laboratory in Torbay, South West England. BBP had a small office there as their 'overseas" location, in order to qualify for a $1 million grant back in 2015, but the phone there is no longer answered, but you can reach Bill at the university on his cell
Mirek Florjanczyk, who was the principal scientist at BBP and whose name is on the patent application with Bill Ring is a Canadian who presently lives outside of Ottawa and is often seem within the walls of the National Research Labs in Ottawa tinkering away.
So, BBP has no physical presence in the US anymore other than their existence as a subsidiary of Poet, and Poet has very little presence in the US any more other than a small office in San Jose.
Singapore is now the operational wheelhouse and perhaps India is in the future