The R101 was an airship which crashed in 1930 in France, killing 48 people.

English socialist government of the time had planned to build airships for the imperial route London-Cairo-Bombay-Canada-Australia-New York-London.
It was an ambitious project that allowed save travel time by sea, also competed with Germany and the Graf Zeppelin airship supremacy.
R.100 series was planned in 1925 and projected 4 aerostats, the R.101 R.100 and would be built simultaneously to be the top seed of the project.