Service marks HMS E49 centenary off Unst

Events are being held to mark the 100th anniversary of the sinking of HMS E49 off Baltasound.

The Royal Navy submarine hit a mine and sank on 12 March 1917.

The incident happened at such speed that all on board died.

Footage, filmed in 2012, shows the remains of the vessel lying on the seabed off Shetland.

Footage: Andy Jackson/Subsea TV