Alba documentary sheds light on the 'lost' villages of Barra, Vatersay and Uist

Her first stop is Sunamal, a small island on Benbecula, which is a ten-minute walk across the sand when the tide is out.

She meets local historian Alasdair MacEachan whose great grandfather ran a successful ferry service between North and South Uist before the causeway was built.

It is also where his mother was born - at that time they were the only family living on the island.