The British Interplanetary Society (BIS), founded in Liverpool in 1933 by Philip E. Cleator, is the oldest space advocacy organisation in the world. Its aim is exclusively to support and promote astronautics and space exploration.
It is a non-profit organisation with headquarters in London and is financed by members' contributions. It is situated on South Lambeth Road (A203) near Vauxhall station, and not far from the Secret Intelligence Service building.
The BIS was only preceded in astronautics by the American Interplanetary Society (founded 1930), the German VfR (founded 1927), and Soviet Society for Studies of Interplanetary Travel (founded 1924), but unlike those it never became absorbed into a national industry. Thus it is now the world's oldest existing space advocacy body.
When originally formed in January 1933, the BIS aimed not only to promote and raise the public profile of astronautics, but also to undertake practical experimentation into rocketry along similar lines to the organisations above.
According to en.wikipedia