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Other investments (Details) - GBP (£) £ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other investments
Weighted average effective interest rate	0.00%	0.40%
Other investments	£ 24	£ 2
Current portion	1	2
Non-current portion	23
Financial assets either past due or impaired
Other investments
Other investments	0	0
Pound
Other investments
Other investments	1	2
Other currencies
Other investments
Other investments	23
Six months to one year | Fixed
Other investments
Other investments	£ 1	£ 2

X

- Definition

The amount of current investments.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

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+ References

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- Definition

The amount of investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

+ References

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- Definition

The amount of non-current investments other than investments accounted for using the equity method. [Refer: Investments accounted for using equity method; Non-current assets; Investments other than investments accounted for using equity method]

+ References

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- Definition

The percentage of interest rate on investments.

+ References

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