1940 | - | Ministry acquires Spring Quarry |
1941 | - | The world’s largest underground factory |
1942 | - | Factory becomes irrelevant |
1943 | - | Factory conversion abandoned |
1944 | - | |
1945 | - | Factory closes |
1946 | - | Ministry of Supplies takes over |
1947 | - | |
1948 | - | Government plans war HQ |
1949 | - | |
1950 | - | Plans for bunker layout complete |
1951 | - | |
1952 | - | |
1953 | - | |
1954 | - | Government purchase Spring Quarry |
1945 | - | |
1956 | - | Corsham to be home of EGWHQ |
1957 | - | Conversion work begins |
1958 | - | |
1959 | - | Bunker takes shape |
1960 | - | Finishing touches |
1961 | - | Burlington goes in to operation |
1962 | - | Bunker on stand-by |
1963 | - | Bunker gets a name change |
1964 | - | |
1965 | - | |
1966 | - | |
1967 | - | |
1968 | - | |
1969 | - | |
1970 | - | |
1971 | - | |
1972 | - | |
1973 | - | |
1974 | - | |
1975 | - | UKMWO upgrades |
1976 | - | |
1977 | - | Project abandoned |
1978 | - | |
1980 | - | |
1981 | - | |
1982 | - | |
1983 | - | |
1984 | - | |
1985 | - | |
1986 | - | |
1987 | - | |
1988 | - | |
1989 | - | Bunker operations wound down |
1990 | - | |
1991 | - | Bunker emptied but maintained |
1992 | - | PINDAR takes over |
1993 | - | |
1994 | - | |
1995 | - | |
1996 | - | |
1997 | - | |
1998 | - | |
1998 | - | |
1999 | - | |
2000 | - | |
2001 | - | |
2002 | - | |
2003 | - | |
2004 | - | EGWHQ declassified |
