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Other investments (Details) - GBP (£) £ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other investments
Weighted average effective interest rate	0.00%	0.00%
Other investments	£ 22.0	£ 24.0
Current portion	1.0	1.0
Non-current portion	21.0	23.0
Financial assets either past due or impaired	0.0	0.0
Pound
Other investments
Other investments	1.0	1.0
Other currencies
Other investments
Other investments	21.0	23.0
Six months | Fixed
Other investments
Other investments	0.0	0.0
Six months to one year | Fixed
Other investments
Other investments	£ 1.0	£ 1.0

X

- Definition

The amount of current investments.

+ References

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

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+ References

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- Definition

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+ References

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