v3.26.1
Goodwill (Tables)
12 Months Ended
Mar. 31, 2026
Intangible assets and goodwill [abstract]  
Schedule of changes in intangible assets and goodwill
Total
£m
Net book value at 1 April 2024
9,729
Exchange adjustments
(117)
Reclassification to held for sale (note 10)
(80)
Net book value at 1 April 2025
9,532
Exchange adjustments
(115)
Net book value at 31 March 2026
9,417
Schedule of allocation of goodwill by operations See below for a summary of which
operations our goodwill and indefinite-lived intangibles are allocated to.
2026
2025
CGU or group of CGUs
£m
£m
Goodwill:
National Grid Ventures – US
97
100
New England
1,471
1,506
New York
3,128
3,205
UK Electricity Distribution1
4,721
4,721
Total goodwill
9,417
9,532
Indefinite-lived intangibles (regulatory licences related
to UK Electricity Distribution):
West Midlands
518
518
East Midlands
519
519
South Wales
257
257
South West
420
420
Total indefinite-lived intangibles
1,714
1,714
1.This is a combination of the West Midlands, East Midlands, South Wales and South West CGUs, reflecting the level at which the goodwill
is monitored.