Stornoway

He said electricity company SSEN's Battery Point Power Station in Stornoway had been ruled out as a cause, and he believed it was unlikely to be coming from boats.

Ms Mitchell, from South Bragar, was taken to the Western Isles hospital, Stornoway, where she died a short time later.

Aleksandr Benga, 16, was last seen near a water wheel in the grounds of Stornoway's Lews Castle at about 08:45 on Monday 18 November.

With two blasts of its horn, MV Hebridean Isles bade farewell as it left the quay at Stornoway for a final time on Sunday, bound for Glasgow before it goes to the breakers.

But a row over the seven-day opening of a Tesco in Stornoway, Lewis, has brought this traditional way of life into focus.