LA(Phot) Kyle Heller/MOD: https://commons.wikimedia.org/wiki/File:HMS_Tyne_Leads_Other_Severn_Class_Fishery_Patrol_Vessels_During_Exercise_MOD_45152274.jpg
LA(Phot) Abbie Gadd/MOD: https://commons.wikimedia.org/wiki/File:Royal_Navy_Type_23_Frigate_HMS_Somerset_MOD_45153155.jpg
LA(Phot) Joel Rouse/MOD: https://commons.wikimedia.org/wiki/File:Royal_Navy_Type_23_Frigate_HMS_Somerset_Sails_for_Operations_Abroad_MOD_45153042.jpg
LA(Phot) Al Macleod/MOD: https://commons.wikimedia.org/wiki/File:HMS_Tyne_Makes_a_Sharp_Turn_on_Exercise_with_Fishery_Protection_Squadron_Exercise_MOD_45153649.jpg
Mil.ru: https://commons.wikimedia.org/wiki/File:Yantar_research_vessel_04.jpg, https://commons.wikimedia.org/wiki/File:Yantar_research_vessel_01.jpg,   https://commons.wikimedia.org/wiki/File:Yantar_research_vessel_02.jpg
Crown Copyright: https://commons.wikimedia.org/wiki/File:HMS_Ambush_long.jpg
Rsc-sprice: https://commons.wikimedia.org/wiki/File:HMS-cattistock.jpg
PenumbraLpz: https://commons.wikimedia.org/wiki/File:HMS_Astute_Anglian_Prince_Skye.JPG
WO(Phot) Ian Arthur/MOD: https://commons.wikimedia.org/wiki/File:HMS_Astute_Arrives_at_Faslane_for_the_First_Time_MOD_45150823.jpg, https://commons.wikimedia.org/wiki/File:HMS_Astute_Arrives_at_Faslane_for_the_First_Time_MOD_45150827.jpg
Andrew Linnett/MOD: https://commons.wikimedia.org/wiki/File:Audacious_Under_Construction_MOD_45155779.jpg
LA(Phot) Jonathan Massey/MOD: https://commons.wikimedia.org/wiki/File:HMS_Astute_Arrives_at_Faslane_for_the_First_Time_MOD_45150821.jpg
LA(Phot) Paul Halliwell/MOD: https://commons.wikimedia.org/wiki/File:Royal_Navy_Submarine_HMS_Astute_Returns_to_HMNB_Clyde_MOD_45153736.jpg