Unknown Sten Manufacturer Codes...

Asking the experts...

I recently purchased a DEWAT Mk. II Sten. The manufacturer markings & codes have me a bit stumped.

The receiver (magwell) is marked...
STEN MK II
E&Co

The trigger guard is marked...
J
H [?] LD
W
These initials are in a shield (please see attached photo).

I believe that "E&Co" is Elkington & Company (Birmingham) however, I cannot find any info on "JHW LD.

What are your thoughts?

Any and all info is very much appreciated.
Many Thanks!

Mystery solved!

JH Ltd W
J HARPER & Co LTD, Willenhall
M.107