Hi Peter,
I had a chance to ask a few people tonight. Most of which were in DP at the time mentioned but nobody, as yet, can recall this business...
But, the following has been suggested..
There is a company called Kabel Management Services Limited that are based in a building at the end of George's row which a few people are fairly sure used to be a car garage at some point.
I have emailed them tonight to ask if they can confirm any of the building history.
George's Row is almost exclusively residential, except for Kabel's building. I would say this could well be the address of the business..
If you have a look at George's row on google earth you can see most of the houses on the right going up the road a pre 1960 but there is a small business unit at the mouth of the road on the right...
I'll keep looking.
Trev