Suits Siebe-Gorman Diving Suits Historical Diving Society Companies formerly listed on the London Stock Exchange Defunct manufacturing companies of England Engineering companies of the United Kingdom Former defence companies of the United Kingdom Diving equipment manufacturers Diving engineering Manufacturing companies based in London British companies established in 1819 Manufacturing companies established in 1819 Manufacturing companies disestablished in 1999 Rebreather makers 1819 establishments in England 1999 disestablishments in England Underwater diving in the United Kingdom United Kingdom in World War II