The Clan MacFarlane Society is worried about the condition of Island I Vow between Tarbet and Ardlui, which was once an ancestral stronghold.

It said the island, which is barely the size of a football pitch, was suffering at the hands of vandals.

But a couple from Bo'ness, who are also Macfarlanes, believe they have the best claim on the island.

They claimed ownership of the island several years ago using a legal process for land with no official owner, and they do not want the Clan MacFarlane Society to have it.

Instead, they are considering offering it to a public body such as the National Trust for Scotland.