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Volume 487: debated on Monday 26 January 2009

To ask the Secretary of State for Defence what the (a) required and (b) actual level of spare part availability is for each (i) frigate, (ii) destroyer and (iii) submarine type in the Royal Navy. (249707)

There is no requirement to measure the availability of spare parts for Royal Navy vessels in the format requested as availability is measured at equipment, rather than platform, level. Instead, the Department holds data on the number of demands made for spare parts and whether the required delivery date for each line was met.

There are over 700 different types of equipment fitted to vessels across the fleet, made up of over 450,000 line items. These include items that support the systems and equipment onboard the vessels themselves, as well as the medical and general stores and the weapons and helicopters that they carry. Records of all replacement equipment demands are not currently held centrally as they are classified. A new system is, however, being rolled out that holds details for some 270,000 line items across 400 types of equipment. Performance statistics for demands placed against those items on the new system in the last 12 months are provided in the following table:

Vessel type

Percentage delivered by required date1

Type 23 Frigate


Type 22 Frigate


Type 42 Destroyer


Swiftsure Class Submarine


Trafalgar Class Submarine


1 Spares that were delivered in time to meet the required delivery date specified by the demander (e.g. ships’ crews).