" I'm a British Gas customer so I wasn't surprised to receive an email that claimed to be a bill from the company. It looked very convincing, with the British Gas logo, and with the correct subject line seeming plausible too : 'Your summer gas & electricity bill'. It told me how much I owed and when to pay it by. Fortunately, I'd already paid my bill, so I guessed the email was a scam. I found a news story about it saying worried customers should ring (0800 048 0202) or email (phishing@centrica.com) British Gas to check whether emails are genuine ".
Ref: Computeractive - reader post by Sandra Goodwin