| Shares
£m | Sundry
investments
£m | Total
£m |
|---|
| Cost | | | |
| At 1 January 2012 | 407.5 | 0.8 | 408.3 |
| Acquisitions | 0.3 | – | 0.3 |
| Disposals | (7.8) | (0.2) | (8.0) |
| At 31 December 2012 | 400.0 | 0.6 | 400.6 |
| Provision for impairment | | | |
| At 1 January 2012 | 7.1 | – | 7.1 |
| Provision in the year | 0.3 | – | 0.3 |
| At 31 December 2012 | 7.4 | – | 7.4 |
| Net book value | | | |
| At 31 December 2012 | 392.6 | 0.6 | 393.2 |
| At 31 December 2011 | 400.4 | 0.8 | 401.2 |
The sundry investments relate to the Bodycote Investment Incentive Plan, as explained in the Board Report on Remuneration.
Details of principal subsidiary undertakings of the Company are shown in Principal subsidiary undertakings.