Final preparations have been taking place for the Hebridean Celtic Festival which gets under way later.

The four-day event, now in its 20th year, draws crowds of 15,000 annually to Stornoway.

Bars, restaurants, cafes, accommodation providers and transport firms are all said to benefit from the festival.

Murdo MacLennan, one of the festival organisers, told BBC Scotland some festival goers could have been affected by the industrial action on CalMac ferries.