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Loss per share (Details) - GBP (£) £ / shares in Units, £ in Thousands	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Loss per share
Net loss for the period, basic	£ (11,770)	£ (17,021)
Net loss for the period, diluted	£ (11,770)	£ (17,021)
Basic loss per share	£ (0.06)	£ (0.10)
Diluted loss per share	£ (0.06)	£ (0.10)
Weighted average issued shares, basic	185,639,462	178,329,218
Weighted average issued shares, diluted	185,639,462	178,329,218

X

- Definition

The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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