Engine problems have put an eighth CalMac ferry out of action, as the operator apologised for a "critical" shortage of ships.

The troubled ferry has returned to the Troon-Arran route though almost a third of CalMac's fleet remains out of service.

Engine problems have put an eighth CalMac ferry out of action, as the operator apologised for a "critical" shortage of ships. MV Lord of the Isles, which has been sailing the Oban to Mull route, ...