v3.26.1
Share-based payments (Details 1)
1 Months Ended 12 Months Ended
Jul. 31, 2024
Number
£ / shares
Feb. 29, 2024
Number
$ / shares
Jan. 31, 2024
Number
$ / shares
Dec. 31, 2025
Number
Dec. 31, 2024
Number
Dec. 31, 2023
Number
Notes and other explanatory information [abstract]            
Number of options 85,922,000 130,313,200 144,000,000 360,235,200
Option pricing models used Black-Scholes Black-Scholes Black-Scholes      
Share price 0.00139 1.310 1.90      
Exercise price of options issued in year | (per share) £ 0.00259 $ 1.310 $ 1.90      
Contractual life 10 years 10 years 10 years      
Expected life 4 years 4 years 4 years      
Volatility [1] 110.00% 100.00% 100.00%      
Expected dividend yield 0.00% 0.00% 0.00%      
Risk free rate 4.025% 4.195% 4.11%      
[1] Volatility was calculated with reference to the historic share price volatility of comparable companies measured over a four-year period.