Understanding Society User Support

Dear Understanding Society Team,

(This is not really an "issue", but I hope I can post my question here as well.)

I have a question with respect to the availability of geographical coordinates of households.

I understand that Understanding Society provides these at the postal code level (under restricted access, of course) since 2011.
Could you please tell me whether something similar also existed for the BHPS, and if so, since when?

Thank you very much for your information!

Best wishes,

Chris