Three Italians and an Austrian were ordered yesterday to stand trial for the 1982 murder of Roberto Calvi, a banker close to the Vatican whose death in London is one of modern Italy's most mysterious unsolved crimes.

The four are Pippo Calò, a Cosa Nostra boss already imprisoned for Mafia activities; Flavio Carboni, a Sardinian wheeler-dealer who arranged for Mr Calvi's fateful trip to London 23 years ago; Ernesto Diotavelli, a Roman underworld figure and Manuela Kleinszig, Mr Carboni's Austrian girlfriend.