It's an eleven mile trip to Berneray, an island of about 10 sq km and around 130 inhabitants. In 1999, it was joined to North Uist, its southerly neighbouring island, by a causeway. This improved travel to the island, employment prospects and the carriage of produce, such as crabs and lobsters. Yum yum. The causeway contains culverts that allow the easy passage of otters and fish from one side to the other. There are also big signs on the road asking drivers to look out for otters crossing. A key feature of Berneray is its machair - a coastal plain made up of windblown shell sand.