Independent retailers had complained that oil companies and supermarkets had been using their scale to give themselves an unfair advantage, but the regulator found no evidence of this.

BBC: OFT says UK petrol market is working well

They argued the second process should not have taken place because essentially the same charges were advanced with no fresh evidence, that it was an abuse of process, and that there was a failure to give any legitimate reason why it was fair to reopen the matter.

BBC: Baby P social workers lose court appeal against sacking