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Earnings per share | 9 Months Ended
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Oct. 01, 2023
Earnings Per Share [Abstract] |
Earnings per share | Earnings per share Basic earnings per share are computed by dividing net income or loss for the period by the weighted-average number of ordinary shares outstanding, net of treasury shares and shares held in ESOP. Diluted earnings per share are computed by dividing net income for the period by the weighted average number of ordinary shares outstanding and the dilutive ordinary shares equivalents. Basic and diluted earnings per share were calculated as follows:
|  | Third Quarter |  | Year-to-date |
| In millions except share and per-share data | 2023 |  | 2022 |  | 2023 |  | 2022 |
| Basic (loss) / earnings: |  |  |  |  |  |  |  |
| Net (loss) / income from continuing operations | $ | (1.5) |  |  | $ | 8.5 |  |  | $ | 3.9 |  |  | $ | 25.8 |  |
| Net income / (loss) from discontinued operations | 0.2 |  |  | (0.5) |  |  | — |  |  | (0.9) |  |
| Net (loss) / income | $ | (1.3) |  |  | $ | 8.0 |  |  | $ | 3.9 |  |  | $ | 24.9 |  |
| Weighted average number of £0.50 ordinary shares: |  |  |  |  |  |  |  |
| For basic earnings per share | 26,895,968 |  |  | 27,295,862 |  |  | 26,913,771 |  |  | 27,403,844 |  |
| Dilutive effect of potential common stock | 120,405 |  |  | 229,452 |  |  | 158,654 |  |  | 249,042 |  |
| For diluted earnings per share | 27,016,373 |  |  | 27,525,314 |  |  | 27,072,425 |  |  | 27,652,886 |  |
| (Loss) / earnings per share using weighted average number of ordinary shares outstanding(1): |
| Basic (loss) / earnings per ordinary share for continuing operations | $ | (0.06) |  |  | $ | 0.31 |  |  | $ | 0.14 |  |  | $ | 0.94 |  |
| Basic earnings / (loss) per ordinary share for discontinued operations | 0.01 |  |  | (0.02) |  |  | — |  |  | (0.03) |  |
| Basic (loss) / earnings per ordinary share | $ | (0.05) |  |  | $ | 0.29 |  |  | $ | 0.14 |  |  | $ | 0.91 |  |
| Diluted (loss) / earnings per ordinary share for continuing operations | $ | (0.06) |  |  | $ | 0.31 |  |  | $ | 0.14 |  |  | $ | 0.93 |  |
| Diluted earnings / (loss) per ordinary share for discontinued operations | 0.01 |  |  | (0.02) |  |  | — |  |  | (0.03) |  |
| Diluted (loss) / earnings per ordinary share | $ | (0.05) |  |  | $ | 0.29 |  |  | $ | 0.14 |  |  | $ | 0.90 |  |
(1) The calculation of earnings per share is performed separately for continuing and discontinued operations. As a result, the sum of the two in any particular period may not equal the earnings-per-share amount in total Basic average shares outstanding and diluted average shares outstanding were the same for continuing operations in the third quarter of 2023 and for discontinued operations in the third quarter of 2022 and year-to-date 2022, because the effect of potential shares of common stock was anti-dilutive since the Company generated a net loss.

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