Provisions - Narrative (Details) £ in Millions |
12 Months Ended | ||
|---|---|---|---|
|
Mar. 31, 2024
GBP (£)
site
|
Mar. 31, 2023
GBP (£)
|
Mar. 31, 2022
GBP (£)
|
|
| Disclosure of other provisions [line items] | |||
| Other provisions | £ 3,109 | £ 2,642 | £ 2,539 |
| Other environment related provision | |||
| Disclosure of other provisions [line items] | |||
| Weighted average duration of cash flows | 10 years 6 months | ||
| Other provisions | £ 2,418 | £ 1,891 | £ 1,877 |
| Other environment related provision | US | |||
| Disclosure of other provisions [line items] | |||
| Number of Superfund sites | site | 3 | ||
| Weighted average duration of cash flows | 10 years | ||
| Other provisions | £ 2,310 | 1,768 | |
| Liability for claims and claims adjustment | |||
| Disclosure of other provisions [line items] | |||
| Other provisions | 170 | 182 | |
| Liability for interconnector excess revenues | |||
| Disclosure of other provisions [line items] | |||
| Other provisions | £ 76 | £ 108 | |