Caledonian MacBrayne's (CalMac) chief executive is stepping down as the Scottish state-owned ferry operator faces ongoing challenges with its aging fleet.

The ferry company announced on Wednesday (3 April) that Robbie Drummond is stepping down with immediate effect from the operator, which has the largest domestic fleet in UK waters.

The development comes just over a week after the Ferguson Marine shipyard of Port Glasgow, which is also state-owned, saw its chief executive, David Tydeman sacked by its board.

This departure comes after a review by the board of CalMac, the operator to west coast islands and across lochs, which is also wholly owned by the Scottish Government with parliament at Holywood, in the capital of Edinburgh.

In recent years, the aging nature of CalMac’s ferry fleet has led to major delays and widespread disruption across its extensive route network along the west coast.

Among the main issues is the ongoing ferry fiasco, costing the Scottish public a 'staggering' £1.3 million a week under ScotGov control.

The shipyard problems have been compounded by ongoing delays to two hybrid duel fuel powered ferries being built at the yard at Port Glasgow.

The twin ferries, Glen Sannox and Glen Rosa, will ultimately serve routes in the west of Scotland with CalMac, are some six years late as the lead ship was due to enter service in 2018.

The cost of both new builds is around three times that of the original price of £97 million.

More from the Herald Scotland on this latest ferry scene and the shipyard saga.