direct to your inboxMoney Saving Expert Martin Lewis has issued a warning to millions of people in the UK, as all of the 'big six' energy companies announce price hikes.The latest energy provider to announce price hikes is British Gas.The energy giant said 2.3million people will be affected by the latest announcement, which will see the provider's average standard default tariff rise from £1,041 to £1,138 a year.The price cap is set twice a year to curb how much suppliers can charge customers on