v3.26.1
Share-based payments (Details)
 1 Months Ended 12 Months Ended
Jul. 31, 2024
Number
Feb. 29, 2024
Number
Jan. 31, 2024
Number
Dec. 31, 2025
Number
£ / shares
Dec. 31, 2024
Number
£ / shares
Dec. 31, 2023
Number
£ / shares
IfrsStatementLineItems [Line Items]            
Beginning of the year     111,590 328,823,388 111,590 144,590
Granted 85,922,000 130,313,200 144,000,000 360,235,200
Lapsed       (25) (6,250)
Forfeited       (15,752,600) (31,523,377) (26,750)
Ending of the year       313,070,788 328,823,388 111,590
Options exercisable       137,022,409 82,874 75,720
Weighted average exercise price of outstanding options | £ / shares       £ 0.005 £ 0.005 £ 5.241
Weighted average exercise price of options exercised | £ / shares      
Weighted average exercise price of options lapsed | £ / shares       30.00 4.04
Weighted average exercise price of options forfeited | £ / shares       0.003 0.006 3.33
Weighted average exercise price of options granted | £ / shares       £ 0.003
Weighted average remaining contractual life of outstanding options       8 years 2 months 12 days 9 years 2 months 12 days 7 years 3 months 18 days
Grant 1 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       19 December 2016    
Beginning of the year       13    
Granted          
Lapsed          
Forfeited          
Ending of the year       13 13  
Exercise Price | £ / shares       £ 484.00    
Grant 2 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       15 December 2017    
Beginning of the year       38    
Granted          
Lapsed          
Forfeited          
Ending of the year       38 38  
Exercise Price | £ / shares       £ 184.00    
Grant 3 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       24 April 2019    
Beginning of the year       237    
Granted          
Lapsed          
Forfeited          
Ending of the year       237 237  
Exercise Price | £ / shares       £ 29.20    
Grant 4 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       2 October 2019    
Beginning of the year       1,500    
Granted          
Lapsed          
Forfeited          
Ending of the year       1,500 1,500  
Exercise Price | £ / shares       £ 21.00    
Grant 5 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       17 April 2020    
Beginning of the year       5,000    
Granted          
Lapsed          
Forfeited          
Ending of the year       5,000 5,000  
Exercise Price | £ / shares       £ 4.80    
Grant 6 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       17 June 2020    
Beginning of the year       26,450    
Granted          
Lapsed          
Forfeited          
Ending of the year       26,450 26,450  
Exercise Price | £ / shares       £ 4.04    
Grant 7 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       15 July 2021    
Beginning of the year       40,850    
Granted          
Lapsed          
Forfeited       (600)    
Ending of the year       40,250 40,850  
Exercise Price | £ / shares       £ 5.55    
Grant 8 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       1 September 2021    
Beginning of the year       6,000    
Granted          
Lapsed          
Forfeited          
Ending of the year       6,000 6,000  
Exercise Price | £ / shares       £ 5.10    
Grant 9 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       7 February 2022    
Beginning of the year       12,500    
Granted          
Lapsed          
Forfeited          
Ending of the year       12,500 12,500  
Exercise Price | £ / shares       £ 3.05    
Grant 10 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       23 January 2024    
Beginning of the year       144,000,000    
Granted          
Lapsed          
Forfeited          
Ending of the year       144,000,000 144,000,000  
Exercise Price | £ / shares       £ 0.004    
Grant 11 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       10 February 2024    
Beginning of the year       98,808,800    
Granted          
Lapsed          
Forfeited       (15,752,000)    
Ending of the year       83,056,800 98,808,800  
Exercise Price | £ / shares       £ 0.003    
Grant 12 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date       10 July 2024    
Beginning of the year       85,922,000    
Granted          
Lapsed          
Forfeited          
Ending of the year       85,922,000 85,922,000  
Exercise Price | £ / shares       £ 0.003    
Grant 13 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         30 June 2014  
Beginning of the year     25 25  
Granted          
Lapsed         (25)  
Forfeited          
Ending of the year         25
Exercise Price | £ / shares         £ 30.00  
Grant 14 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         19 December 2016  
Beginning of the year     13 13 13  
Granted          
Lapsed          
Forfeited          
Ending of the year         13 13
Exercise Price | £ / shares         £ 484.00  
Grant 15 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         15 December 2017  
Beginning of the year     40 38 40  
Granted          
Lapsed          
Forfeited         (2)  
Ending of the year         38 40
Exercise Price | £ / shares         £ 184.00  
Grant 16 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         24 April 2019  
Beginning of the year     312 237 312  
Granted          
Lapsed          
Forfeited         (75)  
Ending of the year         237 312
Exercise Price | £ / shares         £ 29.20  
Grant 17 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         2 October 2019  
Beginning of the year     1,500 1,500 1,500  
Granted          
Lapsed          
Forfeited          
Ending of the year         1,500 1,500
Exercise Price | £ / shares         £ 21.00  
Grant 18 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         17 April 2020  
Beginning of the year     5,000 5,000 5,000  
Granted          
Lapsed          
Forfeited          
Ending of the year         5,000 5,000
Exercise Price | £ / shares         £ 4.80  
Grant 19 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         17 June 2020  
Beginning of the year     27,350 26,450 27,350  
Granted          
Forfeited         (900)  
Ending of the year         26,450 27,350
Exercise Price | £ / shares         £ 4.04  
Grant 20 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         15 July 2021  
Beginning of the year     58,850 40,850 58,850  
Granted          
Lapsed          
Forfeited         (18,000)  
Ending of the year         40,850 58,850
Exercise Price | £ / shares         £ 5.55  
Grant 21 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         1 September 2021  
Beginning of the year     6,000 6,000 6,000  
Forfeited          
Ending of the year         6,000 6,000
Exercise Price | £ / shares         £ 5.10  
Grant 22 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         7 February 2022  
Beginning of the year     12,500 12,500 12,500  
Granted          
Lapsed          
Forfeited          
Ending of the year         12,500 12,500
Exercise Price | £ / shares         £ 3.05  
Grant 23 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         23 January 2024  
Beginning of the year     144,000,000  
Granted         144,000,000  
Lapsed          
Forfeited          
Ending of the year         144,000,000
Exercise Price | £ / shares         £ 0.004  
Grant 24 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         10 February 2024  
Beginning of the year     98,808,800  
Granted         130,313,200  
Lapsed          
Forfeited         (31,504,400)  
Ending of the year         98,808,800
Exercise Price | £ / shares         £ 0.003  
Grant 25 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date         10 July 2024  
Beginning of the year     85,922,000  
Granted         85,922,000  
Lapsed          
Forfeited          
Ending of the year         85,922,000
Exercise Price | £ / shares         £ 0.003  
Grant 26 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           30 June 2014
Beginning of the year     25   25 25
Granted          
Lapsed          
Forfeited          
Ending of the year           25
Exercise Price | £ / shares           £ 30.00
Grant 27 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           19 December 2016
Beginning of the year     13   13 13
Granted          
Lapsed          
Forfeited          
Ending of the year           13
Exercise Price | £ / shares           £ 484.00
Grant 28 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           15 December 2017
Beginning of the year     40   40 40
Granted          
Lapsed          
Forfeited          
Ending of the year           40
Exercise Price | £ / shares           £ 184.00
Grant 29 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           24 April 2019
Beginning of the year     312   312 312
Granted          
Lapsed          
Forfeited          
Ending of the year           312
Exercise Price | £ / shares           £ 29.20
Grant 30 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           2 October 2019
Beginning of the year     1,500   1,500 1,500
Granted          
Lapsed          
Forfeited          
Ending of the year           1,500
Exercise Price | £ / shares           £ 21.00
Grant 31 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           17 April 2020
Beginning of the year     5,000   5,000 5,000
Granted          
Lapsed          
Forfeited          
Ending of the year           5,000
Exercise Price | £ / shares           £ 4.80
Grant 32 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           17 June 2020
Beginning of the year     27,350   27,350 33,600
Granted          
Lapsed           (6,250)
Forfeited          
Ending of the year           27,350
Exercise Price | £ / shares           £ 4.04
Grant 33 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           15 July 2021
Beginning of the year     58,850   58,850 64,350
Granted          
Lapsed          
Forfeited           (5,500)
Ending of the year           58,850
Exercise Price | £ / shares           £ 5.55
Grant 34 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           2 August 2021
Beginning of the year       2,500
Granted          
Lapsed          
Forfeited           (2,500)
Ending of the year          
Exercise Price | £ / shares           £ 5.30
Grant 35 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           1 September 2021
Beginning of the year     6,000   6,000 6,000
Granted          
Lapsed          
Forfeited          
Ending of the year           6,000
Exercise Price | £ / shares           £ 5.10
Grant 36 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           7 February 2022
Beginning of the year     12,500   12,500 18,750
Granted          
Lapsed          
Forfeited           (6,250)
Ending of the year           12,500
Exercise Price | £ / shares           £ 3.05
Grant 37 [Member]            
IfrsStatementLineItems [Line Items]            
Grant date           12 August 2022
Beginning of the year       12,500
Granted          
Lapsed          
Forfeited           (12,500)
Ending of the year          
Exercise Price | £ / shares           £ 2.10