Having sent a letter to the Goldsmiths Company, received a reply a few weeks ago and they have no records of my g/g/grandfather.
If I recall the bulk of the records for Patsy Kensits ancestor were for requests for financial assistance.
Maybe mine was a bit more successful and did not need any help. I do know that one of his son-in-law's was a dealer in "metals" and maybe they were able to help each other when it came to work & contacts.