A "very intelligent" public schoolboy who "wanted to kill somebody" by throwing firebombs on to a motorway has been jailed for four-and-a-half years.

Nicholas Elger was sentenced at Winchester Crown Court for two arson charges for the two attacks on the M3 motorway in September 2017.

The second incident caused the motorway to be closed at Winchester for 11 hours leading to major delays and causing £40 million damage to the economy.

The 17-year-old was also sentenced for eight burglary and two blackmail charges against top public school Winchester College which he attended as a boarder and two charges of theft from a supermarket.

Judge Keith Cutler sentenced Elger to the prison term with an extended licence of four-and-a-half years.