Trident Submarines

Defence written question – answered on 8th March 2010.

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Photo of Jeremy Corbyn Jeremy Corbyn Labour, Islington North

To ask the Secretary of State for Defence how much his Department spent on the maintenance, operation and re-fitting of Trident submarines in each of the last 10 years.

Photo of Bob Ainsworth Bob Ainsworth The Secretary of State for Defence

It is not possible to provide full costs for the maintenance, operation and refitting of the Vanguard class submarines over the whole of the last 10 years as some of the information is not held in the format requested or held centrally, and could be provided only at disproportionate cost. The following table therefore shows the costs that are available in each of the last 10 years.

£ million
1999-2000 2000-01 2001-02 2002-03 2003-04 2004-05 2005-06 2006-07 2007-08 2008-09
External Contractor Costs n/a n/a n/a 0.5 4.3 1.1 1.8 5.7 7.1 3.0
Estimated HM Naval Base Clyde Labour Costs n/a n/a n/a 0.9 7.7 2.1 3.4 10.7 10.7 5.5
LOP(R) Planning and Long Lead Materials 0.0 6.8 45.4 23.0 32.6 19.5 18.8 17.4 27.2 13.3
Vanguard Class LOP (R) 0.0 0.0 0.0 91.0 60.3 75.2 76.6 96.8 60.3 64.4
Alterations and Additions n/a n/a n/a n/a n/a n/a n/a n/a n/a 3.9
Maintenance and refit total 0.0 6.8 45.4 115.3 104.9 97.9 100.7 130.6 105.2 90.8
Vanguard Class Operational Manpower n/a n/a n/a n/a n/a n/a n/a 44.2 44.3 46.3
Vanguard Class Stock n/a n/a n/a n/a n/a n/a n/a 5.9 6.9 8.1
Other costs across Vanguard Class n/a n/a n/a n/a n/a n/a n/a 1.0 1.2 1.6
Operation total n/a n/a n/a n/a n/a n/a n/a 51.1 52.3 56.0
n/a = Not available

The columns may not add to the total given due to rounding. All years apart from 2008-09 have some data that are not available, so the totals provided are incomplete for those years.

The Refit and Maintenance costs take account of the costs of delivering the ongoing Vanguard Class Long Overhaul Period (Refuel) (LOP (R)) programme, the costs of LOP(R) planning, and the procurement of long lead materials. The Refit and Maintenance costs do not include the D154 contract for the Submarine Refitting Facilities Upgrade at Devonport.

For 2002-03 onwards, the costs for Refit and Maintenance include external contractor costs, known as Contracted Out Operational Support (COOPS) under the Warship Support Modernisation Initiative (WSMI), where these can be attributed to the Vanguard Class. The COOPS costs relate to the provision of specialist subcontractor support for propulsion systems, masts and sensors, and weapons systems. It is not possible to provide equivalent costs prior to 2002 as these are not held in the format requested. The COOPS figure for 2002-03 only covers the six months for which data is available.

The figures given for the labour costs at Her Majesty's Naval Base (HMNB) Clyde are estimated because, under WSMI, these costs are collected for HMNB Clyde as a whole, and are not attributed to specific classes of ships or submarines. The figures quoted are derived from the total WSMI costs using a standard methodology. Costs are not available prior to 2002 because the contract for WSMI did not commence until September 2002, and information prior to this is not held in the format requested.

Alterations and Additions costs have been supplied only for 2008-09, which is the only year for which figures are available.

Nuclear propulsion costs are not held in the format requested because they cannot be broken down by submarine class. These costs would include the supply of spares and maintenance of Nuclear Steam Raising Plant components, the costs of Technical Authority support for maintenance of the design intent and safety case, the independent nuclear safety advice for the plant, and the provision of new reactor cores at refits. They would also cover the provision of cores, spares and other materiel maintenance by the equipment suppliers.

Operating costs prior to 2006-07 are not held centrally. The operating costs include manpower, stock (such as tools and hardware) and other costs such as travel and subsistence, and accommodation stores.

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