Grateful Dead: DeadHead slang for nitrous oxide?

Questions

May 2002, which vaughan williams violin piece has been voted top British classical composition of all time?

June 2002, name of the discgraced South African cricketer killed in a plane crash?

Who wrote A handful of Dust, Vile Bodies and Decline and Fall?

Which Briton was World Motor racing champion in 1962 and 1968?

In which film was Dustin Hoffman 121 years old?