XML 106 R71.htm IDEA: XBRL DOCUMENT v3.21.1
Net other operating income (Details)
 12 Months Ended
Dec. 31, 2020
GBP (£)
LeaseholdProperty
Contract
Dec. 31, 2019
GBP (£)
Dec. 31, 2018
GBP (£)
Net other operating income [Abstract]      
Profit on derecognition of leases £ 3,700,000 £ 0 £ 0
Loss on disposal property, plant and equipment (1,064,000) 0  
Settlement agreement 810,000 0  
Sub-lease income 460,000 185,000 622,000
Remeasurement of leases 227,000 0 0
Other 109,000 0  
Net other operating income £ 4,242,000 £ 185,000 £ 622,000
Other income [Abstract]      
Number of leasehold properties | LeaseholdProperty 2    
Profit on disposal of leasehold properties £ 3,700,000    
Incentive payment 1,400,000    
Settlement agreement amount £ 810,000    
Number of open contract with third-party vendors was terminated | Contract 1    
Employee and Third Party Vendors Proceedings [Member]      
Other income [Abstract]      
Settlement amount recovered £ 1,800,000    
Bottom of Range [Member] | Employee and Third Party Vendors Proceedings [Member]      
Other income [Abstract]      
Estimated settlement amount 1,100,000    
Top of Range [Member] | Employee and Third Party Vendors Proceedings [Member]      
Other income [Abstract]      
Estimated settlement amount £ 1,800,000