Looking for HP 41 owner near Brentwood / Romford UK

[some.kind.of.bk]

I'm looking to test an HP Time Module that I found amongst my late grandfather's calculators. Unfortunately he did not have an HP 41.

If you have an HP 41, and live somewhere near Brentwood or Romford UK, and would be willing to help me test the Time Module, please reach out.

Alternatively, if you know of a better way for me to find someone to help, please let me know.

Thanks in advance for your help.

BK