The Corona works, in the maps (posts 41/45) caught my eye. Corona is mentioned in a few threads on BHF.
The company was founded by two grocers in the Rhondda in 1897. They were concerned that many miners spent too much of their money on alcoholic drinks and consequently provided soft drinks from a factory they built. Originally the house to house deliveries were by horse and cart. Eventually there were 87 Corona factories in the UK, the company became part of the Britvic Group in 1987. The original factory, in South Wales,still exists as a community arts centre.