CalMac has warned that possible "extreme weather" could spark further distruption to the Arran ferry service later this week

Services on December 29, 30 and 31 could be affected by strong winds in the Firth of Clyde.

The warning comes after bad weather forced the cancellation of services on the afternoon and evening of December 24, ruining some travellers' Christmas plans.

The company said in a statement: "Due to the current weather forecast, service is liable to disruption or cancellation at short notice from Wednesday 29th through to Friday 31st December.

"The long range forecast at the moment suggests extreme weather in this area for the rest of the week and into the first half of next week. 

"Passengers are advised to bear this in mind when planning their journey. 

"This situation will be kept under close review and we will update accordingly when more accurate forecasts are available."