| 1 January 2012 (as previously reported) | 33.0 | 176.9 | (6.7) | 143.1 | 24.7 | 110.3 | 481.3 | 1.3 | 482.6 |
| Impact of IAS 19 (revised) | – | – | – | – | – | (0.3) | (0.3) | – | (0.3) |
| 1 January 2012 (as restated) | 33.0 | 176.9 | (6.7) | 143.1 | 24.7 | 110.0 | 481.0 | 1.3 | 482.3 |
| Net profit for the year | – | – | – | – | – | 67.1 | 67.1 | 0.1 | 67.2 |
| Exchange differences on translation of overseas operations | – | – | – | – | (14.2) | – | (14.2) | – | (14.2) |
| Actuarial losses on defined benefit pension schemes net of deferred tax | – | – | – | – | – | (4.1) | (4.1) | – | (4.1) |
| Total comprehensive income for the year | – | – | – | – | (14.2) | 63.0 | 48.8 | 0.1 | 48.9 |
| Issue of share capital | 0.1 | 0.2 | – | – | – | – | 0.3 | – | 0.3 |
| Acquired in the year / settlement of share options | – | – | (4.6) | (5.0) | – | (1.4) | (11.0) | – | (11.0) |
| Share-based payments | – | – | – | 3.9 | – | – | 3.9 | – | 3.9 |
| Deferred tax on share-based payment transactions | – | – | – | – | – | 1.0 | 1.0 | – | 1.0 |
| Dividends paid | – | – | – | – | – | (21.3) | (21.3) | – | (21.3) |
| Realisation of revaluation surplus | – | – | – | (0.4) | – | 0.4 | – | – | – |
| 31 December 2012 | 33.1 | 177.1 | (11.3) | 141.6 | 10.5 | 151.7 | 502.7 | 1.4 | 504.1 |
| Net profit for the year | – | – | – | – | – | 73.0 | 73.0 | 0.1 | 73.1 |
| Exchange differences on translation of overseas operations | – | – | – | – | (3.0) | – | (3.0) | (0.1) | (3.1) |
| Movement on hedges of net investments | – | – | – | – | (1.3) | – | (1.3) | – | (1.3) |
| Actuarial losses on defined benefit pension schemes net of deferred tax | – | – | – | – | – | (0.4) | (0.4) | – | (0.4) |
| Total comprehensive income for the year | – | – | – | – | (4.3) | 72.6 | 68.3 | – | 68.3 |
| Acquired in the year / settlement of share options | – | – | 5.8 | (5.1) | – | (4.2) | (3.5) | – | (3.5) |
| Share-based payments | – | – | – | 3.6 | – | – | 3.6 | – | 3.6 |
| Deferred tax on share-based payment transactions | – | – | – | – | – | (0.3) | (0.3) | – | (0.3) |
| Dividends paid | – | – | – | – | – | (24.0) | (24.0) | – | (24.0) |
| Disposed with subsidiary | – | – | – | – | (1.5) | 1.5 | – | – | – |
| Purchase of non-controlling interests | – | – | – | – | – | – | – | (0.8) | (0.8) |
| 31 December 2013 | 33.1 | 177.1 | (5.5) | 140.1 | 4.7 | 197.3 | 546.8 | 0.6 | 547.4 |