THE YELL Sound ferry service has suffered more disruption after the Fivla developed a fault with the cooling system on one of its engines.
The vessel has been withdrawn from service and engineers hope to have her back in action on Monday morning.
Ferry services on Yell Sound have been reduced to a single vessel service for the rest of Friday, and prior bookings are suspended.
The Fivla would have undertaken four more crossings at 4pm and 4.55pm from Ulsta, and 4.55pm and 5.25pm from Toft.
These sailings will now not take place, with Shetland Islands Council apologising to anyone affected.
Stand-in vessel Fivla was filling in for the usual Yell ferry Dagalien, which is out of service having a refit.