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Trade and other payables - Put Option Liability (Details) £ in Millions	12 Months Ended
	Dec. 31, 2022 GBP (£)
Minimum
Trade and other payables
Cash flow period for all non-current liabilities	1 year
Maximum
Trade and other payables
Cash flow period for all non-current liabilities	5 years
PCI India | Estimated option price
Trade and other payables
Percentage of reasonably possible decrease in risk assumption	5.00%
Increase (decrease) in put option liability due to reasonably possible decrease in designated risk component	£ (2)
PCI India | Discount rate
Trade and other payables
Percentage of reasonably possible decrease in risk assumption	1.00%
Increase (decrease) in put option liability due to reasonably possible decrease in designated risk component	£ 2

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The period during which the cash is due to flow for all non-current liabilities.

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- Definition

The increase (decrease) in a liability as a result of an decrease in a designated risk component that was reasonably possible at the end of the reporting period.

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- Definition

The reasonably possible percentage of the decrease in the designated risk component used to determine the value of the financial instrument. Excludes defined benefit plan obligations.

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