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Notes 1-5

4. Operating costs and share of results of associates

Operating costs include:

  Six months
ended
30 June
2011
£m
Six ???months
ended
30 June
2010
£m
Year ended
31 December
2010
£m
Total staff costs 2,860.0 2,684.1 5,438.7
Establishment costs 330.4 331.1 659.2
Other operating costs 731.2 724.5 1,489.6
Total operating costs 3,921.6 3,739.7 7,587.5

Other operating costs include:

  Six months
ended
30 June
2011
£m
Six ???months
ended
30 June
2010
£m
Year ended
31 December
2010
£m
Amortisation and impairment of acquired intangible assets 83.3 87.0 170.5
Goodwill impairment 10.0 10.0
Losses/(gains) on disposal of investments 2.7 0.7 (4.1)
Gains on re-measurement of equity interest on acquisition of controlling interest (25.4) (7.5) (13.7)
Investment write-downs 0.9 2.2 37.5

There was no goodwill impairment charge for the six months ended 30 June 2011 (30 June 2010: £10.0 million). The directors will reassess the need for any impairment write-downs at year end.

Share of results of associates include:

  Six months
ended
30 June
2011
£m
Six ???months
ended
30 June
2010
£m
Year ended
31 December
2010
£m
Share of profit before interest and taxation 40.4 38.7 86.0
Share of exceptional losses (0.7) (0.4) (0.3)
Share of interest and non-controlling interests (1.7) (1.3) (2.7)
Share of taxation (13.5) (14.7) (27.8)
  24.5 22.3 55.2