The Royal Navy's largest and most powerful attack submarine arrived at Faslane Naval Base this morning.
Measuring nearly 328 ft in length she has started her sea trials and is expected to be handed over in around 18 months.
She sailed up the Gareloch to her new home for the first time with plenty media coverage of the event.
Ambush, Artful, and Audacious have already been approved, and they should arrive at two yearly intervals.
I covered this event for the 'Defence Press Agency' as a contributor to the - Monitoring Matters - E-Zine.
HMS Astute Arrives at her new base for the first time
HMS Astute Nears to Berth at Faslane Naval Base
Commodore Chris Hockley, the naval base commander at HM Naval Base Clyde with HMS Astute in the Background
More images are available at - www.dougie-coull-photography.co.uk - and are also better resolution.