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George Thetford's yard was at 10/11 Bungalow Lane. The Yare Valley Sailing Club was formed there in 1948. George was still there in 1961 but I don't know when he gave it up or sold it. Today the land is private but little changed from its boatyard days. On the attached map the yard is shown edged red. The BA dockyard abuts the right hand edge of the map. I hope this helps your researches.