It is the most southerly of the islands in the Pentland Firth between the Orkney islands and Caithness , the northeasternmost part of the mainland .
Stroma is an island off the northern coast of the mainland of Scotland .
Stroma is the most Stroma of the islands in the Pentland Firth between the Orkney islands and Caithness , the northeasternmost part of the mainland .
Stroma is an island off the northern coast of the mainland of Scotland .