As the largest energy company in the UK, with over 15 million customers and an extensive product range, British Gas continues to be the first choice for customers home needs. Only one energy and HomeCare application per household will be processed. Multiple applications are not accepted and may result on your original applications cash-back also being cancelled.Please note, in order to protect the quality of their signups, British Gas will be extending the time before confirming and passing over cashback on purchases - up to 120 days.