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Friday Street is a hamlet on the gentle lower north slope of Leith Hill in Surrey. It is in a wooded headwater ravine, just to the south of Wotton and the A25.
Its lake is one of three hammer ponds in the Vale of Holmesdale in Surrey. These were used from the medieval age until the early 19th century. The hamlet has no services except a pub (The Stephan Langton).

The iron industry thrived in the Weald of Kent, Sussex & Surrey from Pre-Roman times until the Industrial revolution. The industry was based on Iron ore from the Cretaceous rocks of the area and charcoal from the woodlands. The remains of the industry can still be seen in the many Hammer ponds in the area and woodland names such as Furnace, Minepit etc. The use of coal not charcoal saw the demise of the industry.
Wikipedia: Link