Uncle George's business address of 31 Strand Street is, as I thought no longer there, along that stretch of road is a Fitness Club and the Police Station. But the site would have been opposite the Albert Dock so in exactly the right place for a ships chandlers and sailmakers.
Just to cheer us up I took a picture of the likely pub where George and Charles probably would have gone for a pint after work, the Baltic Fleet one of the oldest and most well known around the Liverpool dock area.
A friend on another Liverpool messageboard has kindly done us a look up in Trade Directories and it seems that, maybe after George died, Charles either moved or took additional premises.
The company is still going in 1911, there is a reference to a Charles M. Robertson, Ships Chandler (Geo. R. & sons) 57 Peel St. S.
1939, There is no mention of Charles Robertson, or the business
Wish I had known about this address before I took my trip, Peel Street is right opposite the top end of South Hill Road. I don't know the area at all so I'm not able to say whether there are any properties still there.