Nick Catford has written more about the railway tunnel under Blackheath Hill in this month's London Railway Record - perhaps what is most interesting about it is the use of the tunnel after the railway had closed. He thinks that in the 1930s the tunnel was used to store breeze blocks and in the Second World War was leased to the Council as an air raid shelter. After the war it was used by the Heliot Machine Tool Company and later in the 1950s by R.Taylor & Co. Machine Tools and then latterly by Maganal Plastics (Alan and Margaret Storey). He records that they made road signs for local authorities and that they were the first to standardise road signs and produce a proper catalogue. Alan Storey pioneered the use of the reflective clip which was made under Blackheath Hill - another example of innovation by a Greenwich based industry.
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