The cost of completing two ferries at state-owned Ferguson Marine shipyard is set to top construction costs for the Scottish Parliament.
The project to build Holyrood 20 years ago sparked the first major scandal of the devolved era when the price rocketed by more than £300million. The iconic building was completed three years late with an ultimate price tag of £419million.
Government sources have said the price of delivering two CalMac ferries through the nationalised Ferguson Marine shipyard is now likely to top that figure.