Something like supply new vessel, designed and built under normal commercial conditions to ice-class in commercial dockyard in twelve months = £20 million max.
Allow for the fact it will be MoD contract subject to numerous reviews, re-designs, consultations, political interference, over-manning, cancellation, revival in time for an election with no firm date for delivery..........
Yes, suddenly that journalist's wildly ignorant estimate starts to look realistic.
Barry M