v3.24.1.1.u2
Exceptional items and remeasurements - Schedule of exceptional items and remeasurements from continuing operations (Details) - GBP (£)
£ in Millions
12 Months Ended 17 Months Ended 24 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2023
Included within operating profit          
Release of St William Homes LLP deferred income £ 19,850 £ 21,659 £ 18,449    
Operating profit 4,475 4,879 4,371    
Included within finance income and costs          
Net gains/(losses) on financial assets at fair value through profit and loss 4 (28) (15)    
Finance income and costs (1,464) (1,460) (1,022)    
Included within share of post-tax results of joint ventures and associates          
Profit before tax 3,048 3,590 3,441    
Included within tax          
Tax on exceptional items and remeasurements (831) (876) (1,258)    
Analysis Of Exceptional Items And Remeasurements After Tax [Abstract]          
Profit after tax from continuing operations 2,217 2,714 2,183    
Exceptional items 
and remeasurements (see note 5)          
Included within operating profit          
Operating profit (987) 585 558    
Included within share of post-tax results of joint ventures and associates          
Profit before tax (1,036) 620 561    
Included within tax          
Tax on exceptional items and remeasurements 152 (241) (589)    
Analysis Of Exceptional Items And Remeasurements After Tax [Abstract]          
Profit after tax from continuing operations (884) 379 (28)    
Exceptional items          
Included within operating profit          
Transaction, separation and integration costs (44) (117) (223)   £ (340)
Cost efficiency programme (65) (100) (42) £ (142)  
IFA fire 92 130 0    
Changes in environmental provisions (496) 176 0    
Provision for UK electricity balancing costs (498) 0 0    
New operating model implementation costs 0 0 (24)    
Environmental insurance recovery 0 0 38    
Operating profit (1,011) 935 166    
Included within tax          
Tax on exceptional items and remeasurements 159 (316) (28)    
Analysis Of Exceptional Items And Remeasurements After Tax [Abstract]          
Profit after tax from continuing operations (852) 619 (320)    
Exceptional items | UK          
Included within tax          
Deferred tax expense (income) relating to tax rate changes or imposition of new taxes 0 0 (458)    
Remeasurements          
Included within finance income and costs          
Net gains/(losses) on financial assets at fair value through profit and loss 4 (28) (15)    
Net gains on financing derivatives 11 82 74    
Finance income and costs 15 54 59    
Included within share of post-tax results of joint ventures and associates          
Net losses on financial instruments (64) (19) (56)    
Included within tax          
Tax on exceptional items and remeasurements (7) 75 (103)    
Analysis Of Exceptional Items And Remeasurements After Tax [Abstract]          
Profit after tax from continuing operations (32) (240) 292    
Remeasurements | Commodity contract derivatives          
Included within operating profit          
Operating profit 24 (350) 392    
St William Homes LLP | Exceptional items          
Included within operating profit          
Net gain on disposal 0 0 228    
Release of St William Homes LLP deferred income 0 0 189    
Millennium Pipeline Company, LLC | Exceptional items          
Included within operating profit          
Net gain on disposal 0 335 0    
The Narragansett Electric Company | Exceptional items          
Included within operating profit          
Transaction, separation and integration costs (11) (39)      
Net gain on disposal £ 0 £ 511 £ 0