8 Property and equipment

  2006
£000
2007
£000
Owned buildings 190 190
Leasehold improvements 18,054 15,837
Computers 18,445 17,078
Software 8,457 8,491
Fixtures, fittings and motor vehicles 4,676 3,878
Assets under construction 758
  49,822 46,232
Less: accumulated depreciation (35,852) (34,190)
Property and equipment, net 13,970 12,042

Depreciation charged to income for the years ended 31 December 2005, 2006 and 2007 was £7,750,000, £6,895,000 and £7,236,000 respectively. The net book value of software at 31 December 2007 was £2,706,000 (2006: £3,674,000) with depreciation charged in 2007 on software of £1,744,000 (2006: 1,610,000; 2005: £1,851,000).