The following list comes from a Freedom of Information request, the numbers pertain to the last financial year and are the average cost for each Royal Navy and Royal Fleet Auxiliary vessel when on deployment. The figures are the average cost of each vessel in a class.

Astute class £9.9 million

Trafalgar class £11.7 million

Vanguard class £18.6 million

Type 23 £11.7 million

Type 45 £14.8 million

HMS Ocean £12.3 million

Albion class £24 million

River class £3.5 million

Hunt class £2.8 million

Sandown class £3 million

Echo class £5.5 million

Gleaner coastal survey ship £555,000

HMS Scott £4.5 million

HMS Protector £7.4 million

Wave class £9.1 million

Leaf class £5.7 million

Rover class £7.2 million

Fort Victoria £14.3 million

Fort Austin class £11.8 million

Bay class £8.2 million

RFA Argus £8.9 million

RFA Diligence £6.6 million