Shipping movements was restricted in the Sound this afternoon and the arrival of HMS Astute.
The 97-metre long Astute was the first of its class, and commissioned in 2010, and declared fully operational in 2014.
Serco Group vessels and police patrol boats escorted the British submarine into HMNB Devonport. HMS Anson is possibly deployed to protect #CSG25 with carrier HMS Prince of Wales.
