Statement Of Cash Flows [Abstract]
| Concept |
As at 2025-03-31 |
2024-04-01 to 2025-03-31 |
2023-04-01 to 2024-03-31 |
As at 2024-03-31 |
As at 2023-03-31 |
|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||
| Cash flows from (used in) operating activities [abstract] | |||||
| Cash flows from (used in) operations | — |
2, 62 1.0
GBP
|
4,049,100,000
GBP
|
— | — |
| Dividends received, classified as operating activities | — |
200,600,000
GBP
|
223,700,000
GBP
|
— | — |
| Interest paid, classified as operating activities | — |
10 4. 2
GBP
|
67 .0
GBP
|
— | — |
| Income taxes paid (refund), classified as operating activities | — |
240,600,000
GBP
|
345,800,000
GBP
|
— | — |
| Cash flows from (used in) operating activities | — |
2,4 7 6.8
GBP
|
3,860,000,000
GBP
|
— | — |
| Cash flows from (used in) investing activities [abstract] | |||||
| Cash flows from losing control of subsidiaries or other businesses, classified as investing activities | — |
25 .2
GBP
|
14 .9
GBP
|
— | — |
| Cash flows used in obtaining control of subsidiaries or other businesses, classified as investing activities | — |
–
GBP
|
42 .9
GBP
|
— | — |
| Purchase of property, plant and equipment, classified as investing activities | — |
2 ,689. 2
GBP
|
1,970,300,000
GBP
|
— | — |
| Purchase of intangible assets, classified as investing activities | — |
4 41 . 8
GBP
|
542. 2
GBP
|
— | — |
| Proceeds from government grants, classified as investing activities | — |
55,700,000
GBP
|
93 . 4
GBP
|
— | — |
| Cash flows from (used in) investing activities | — |
3,318,400,000
GBP
|
2 ,858 .3
GBP
|
— | — |
| Cash flows from (used in) financing activities [abstract] | |||||
| Proceeds from issuing shares | — |
17,800,000
GBP
|
9. 2
GBP
|
— | — |
| Payments to acquire or redeem entity's shares | — |
71 .7
GBP
|
–
GBP
|
— | — |
| Proceeds from borrowings, classified as financing activities | — |
2,5 9 2.2
GBP
|
1,9 82.2
GBP
|
— | — |
| Repayments of borrowings, classified as financing activities | — |
1 , 162 . 2
GBP
|
1 ,842.7
GBP
|
— | — |
| Cash flows from (used in) financing activities | — |
896. 2
GBP
|
857 .6
GBP
|
— | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — |
54,600,000
GBP
|
14 4 . 1
GBP
|
— | — |
| Cash and cash equivalents |
1,0 90 .5
GBP
|
— | — |
1,0 35 .9
GBP
|
891. 8
GBP
|