At the time, Egyptian authorities decided none of the artefacts from the tomb should leave Egyptian control.

BBC: New York museum to return King Tut artefacts to Egypt

The school's transformation will see it leave local authority control and be run by educational charity, the Cabot Learning Federation.

BBC: Weston's Wyvern School wins funding for academy plan

Ever more companies see joint ventures as an attractive alternative to mergers, even if they leave issues of control fuzzily unclear.

ECONOMIST: Phone tie-ups