Revenue by Segment

Financials in millions GBP. Fiscal year is January - December.

Millions GBP. Fiscal year is Jan - Dec.

Fiscal Year	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020	FY 2019	FY 2018	FY 2017	FY 2016
Period Ending	Dec '25 Dec 31, 2025	Dec '24 Dec 31, 2024	Dec '23 Dec 31, 2023	Dec '22 Dec 31, 2022	Dec '21 Dec 31, 2021	Dec '20 Dec 31, 2020	Dec '19 Dec 31, 2019	Dec '18 Dec 31, 2018	Dec '17 Dec 31, 2017	Dec '16 Dec 31, 2016
Retail	16.51B	17.12B	-	-	-
Retail Growth	-3.60%	-	-	-	-
Optimisation	6.05B	6.54B	-	-	-
Optimisation Growth	-7.42%	-	-	-	-
Infrastructure	2.00B	2.91B	-	-	-
Infrastructure Growth	-31.18%	-	-	-	-
Inter-Segment Revenue	-2.20B	-1.94B	-1.97B	-3.55B	-2.18B
Unallocated Revenue Arising from Contracts in Scope of IFRS 9 Included in Business Performance	-2.87B	-4.72B	-6.92B	-9.90B	-3.56B
British Gas Services & Solutions	-	-	1.60B	1.53B	1.51B
British Gas Services & Solutions Growth	-	-	4.58%	0.93%	-2.20%
British Gas Energy	-	-	17.74B	13.10B	7.51B
British Gas Energy Growth	-	-	35.48%	74.31%	7.22%
Bord Gas Energy	-	-	1.82B	1.77B	1.11B
Bord Gas Energy Growth	-	-	2.48%	59.41%	35.49%
Centrica Business Solutions	-	-	3.52B	3.00B	1.98B
Centrica Business Solutions Growth	-	-	17.40%	51.44%	29.82%
Centrica Energy	-	-	7.73B	14.44B	6.08B
Centrica Energy Growth	-	-	-46.46%	137.44%	108.50%
Upstream	-	-	2.94B	3.35B	2.28B
Upstream Growth	-	-	-12.41%	46.84%	18.98%
Total	19.49B	19.91B	26.46B	23.74B	14.74B
Total Growth	-2.11%	-24.74%	11.44%	61.02%	20.37%

Revenue by Geography

Financials in millions GBP. Fiscal year is January - December.

Millions GBP. Fiscal year is Jan - Dec.

Fiscal Year	FY 2025	FY 2024	FY 2023	FY 2022	FY 2021	FY 2020	FY 2019	FY 2018	FY 2017	FY 2016
Period Ending	Dec '25 Dec 31, 2025	Dec '24 Dec 31, 2024	Dec '23 Dec 31, 2023	Dec '22 Dec 31, 2022	Dec '21 Dec 31, 2021	Dec '20 Dec 31, 2020	Dec '19 Dec 31, 2019	Dec '18 Dec 31, 2018	Dec '17 Dec 31, 2017	Dec '16 Dec 31, 2016
United Kingdom	15.82B	16.24B	22.21B	17.48B	10.89B
United Kingdom Growth	-2.59%	-26.87%	27.04%	60.50%	11.28%
Republic of Ireland	1.02B	1.02B	1.44B	1.32B	903.00M
Republic of Ireland Growth	0.10%	-29.00%	8.69%	46.51%	24.55%
Europe (excluding Uk and Republic of Ireland)	1.64B	1.42B	1.73B	-	-
Europe (excluding Uk and Republic of Ireland) Growth	15.25%	-17.89%	-	-	-
Rest of The World	1.01B	1.23B	1.08B	2.60B	1.64B
Rest of The World Growth	-17.82%	13.80%	-58.43%	58.13%	36.24%
Scandinavia (Including Denmark)	-	-	-	1.47B	894.00M
Scandinavia (Including Denmark) Growth	-	-	-	64.77%	-
North America	-	-	-	867.00M	413.00M
North America Growth	-	-	-	109.93%	55.26%
Total	19.49B	19.91B	26.46B	23.74B	14.74B
Total Growth	-2.11%	-24.74%	11.44%	61.02%	20.37%

Source: S&P Global Market Intelligence.