Marine Stores are generally known as Chandlers and they supply many of the items necessary for a ship in order to set sail. The only Chandlers shops I have seen in the Midlands of late are the Canal Chandlers and they supply all manner of goods to the long boat owners and renters. They are usually located in Canal side streams or basins. The one I visited sold groceries
as well as hardware, etc.
Here in Vancouver there used to be lots of Chandlers close to the harbour,
They would supply items for the huge vessels that visit the port. I am not sure where they are these days. Condos where they used to be!