The BBC News website reports that the Royal Navy's biggest and most powerful attack submarine is due to arrive at Faslane on the Clyde later.
Astute which measures nearly 328ft (100m) from bow to stern, set sail from Barrow in Cumbria for its first sea trials on Tuesday.
The vessel can be armed with 38 torpedoes and missiles - more than any previous Royal Navy submarine.
It will sail into the Clyde and up the Gareloch to its new home at the Scottish naval base.
The BAE Systems-built vessel is due to go into full service next year.
To read the full article please click here.