The Royal Oak, a Royal Navy flagship, was sunk by a German U-boat in Scapa Flow off Orkney near the start of the second world war. |
It was torpedoed by a German U-boat towards the end of World War Two. |
The U-boat crew grimly stalked its prey under rather less opulent living conditions. |
In his book, he raises the possibility that a German spy, based in Scotland, may have helped lead the U-boat into Scapa Flow. |
There was a procession to St Margaret's Church for a special service of prayer for the men fighting the U-boat menace on the high seas. |
The warship, sunk by a German U-boat in 1939 with the loss of 833 lives, is a designated war grave. |