Planned and reactive maintenance costs for HMS Gannet for each of the last five years are shown in the following table. Financial year Maintenance cost (£) 2005-06 72,351 2006-07 72,082 2007-08 69,804 2008-09 61,634 2009-10 ¹43,724 ¹ To date. Projects outside the scope of this response include changes to operational requirements, condition improvements, and lifecycle replacements.The reduction in maintenance costs per year is due to the reactive maintenance element of the service provided. By its very nature reactive maintenance is unpredictable in its volume, scope and cost and is dependent on many operational usage factors.