Thousands of customers are due money back after energy firms mix up imperial and metric gas meters: Could you be affected?
![Thousands of customers are due money back after energy firms mix up imperial and metric gas meters: Could you be affected?](http://i.dailymail.co.uk/i/pix/2016/08/15/10/190F7DE900000578-0-image-a-7_1471254680833.jpg)
Energy companies are due to refund thousands of gas customers after an error meant their gas usage wasn’t correctly recorded and firms are now contacting affected customers.