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Investments in associated undertakings (Tables) | 12 Months Ended
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Dec. 31, 2022
Investments in associated undertakings |
Summary of interest in associated undertakings | ​
​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
​ | ​ | £m | ​ | £m
Interest in Nippon Calmic Limited |  | 32 |  | 29
Interest in individually immaterial associated undertakings |  | 21 |  | 1
At 31 December |  | 53 |  | 30
Nippon Calmic Limited |
Investments in associated undertakings |
Summary of reconciliation of interest in associated undertakings | ​
​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
​ | ​ | £m | ​ | £m
At 1 January | ​ | 29 | ​ | 27
Exchange differences |  | (1) |  | (2)
Share of profit1 |  | 8 |  | 8
Dividends received |  | (4) |  | (4)
At 31 December |  | 32 |  | 29
1. | Share of profit is net of tax of £4m (2021: £4m).
Summary of additional information of associated undertakings | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Assets |  | Liabilities |  | Revenue |  | Profit |  | Assets |  | Liabilities |  | Revenue |  | Profit
​ | ​ | 2022 | ​ | 2022 | ​ | 2022 | ​ | 2022 | ​ | 2021 | ​ | 2021 | ​ | 2021 | ​ | 2021
​ | ​ | £m | ​ | £m | ​ | £m | ​ | £m | ​ | £m | ​ | £m | ​ | £m | ​ | £m
Nippon Calmic Ltd (49%) |  | 66 | ​ | (33) | ​ | 52 | ​ | 8 |  | 53 |  | (24) |  | 52 |  | 8
​
Individually immaterial associated undertakings |
Investments in associated undertakings |
Summary of reconciliation of interest in associated undertakings | ​
​ | ​ | ​ | ​ | ​
​ |  | 2022 |  | 2021
​ | ​ | £m | ​ | £m
At 1 January | ​ | 1 | ​ | —
Exchange differences |  | (1) |  | —
Acquisition |  | 20 |  | 1
Share of profit |  | 1 |  | —
Dividends received |  | — |  | —
At 31 December |  | 21 |  | 1
​

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- Definition The disclosure of interests in associates. [Refer: Associates [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2023-01-01 -Paragraph 2 -Subparagraph b -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2023-en-r&anchor=para_2_b_ii&doctype=Standard -URIDate 2023-03-23 + Details
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