New doubt cast over Mull of Kintyre Chinook crash cause
Newly discovered Ministry of Defence documents have cast further doubt on the cause of the Chinook helicopter crash on the Mull of Kintyre in 1994.
The papers, obtained by the BBC, suggest there were official concerns over the airworthiness of the RAF's fleet of Chinooks two years earlier.
It is understood they were never shown to the officer in charge of signing off the aircraft's airworthiness.
Tim Reid reports.