Category:Energy companies of the United Kingdom

• Energy companies of Northern Ireland (2 C)
• Energy companies of England (4 C, 2 P)
• Energy companies of Scotland (4 C, 1 P)
• Energy companies of Wales (1 C, 2 P)

+

• Energy companies of the Crown Dependencies (2 C)

C

• Coal companies of the United Kingdom (3 C, 13 P)

D

• Defunct energy companies of the United Kingdom (3 C, 8 P)

O

• Oil and gas companies of the United Kingdom (7 C, 60 P)

P

• Electric power companies of the United Kingdom (13 C, 45 P)

R

• Renewable energy companies of the United Kingdom (4 C, 7 P)

• Big Six energy suppliers

B

• Benchmark Mineral Intelligence
• Breeze Energy

C

• Cadent Gas
• Cape plc

G

• Gaffney, Cline & Associates
• GFG Alliance

H

• Harbour Energy

P

• Priority Services Register

S

• SIMEC Group