<p>UK gas bills are calculated in kWh and are determined by the volumes of gas served and the Flow Weighted Average Calorific Value (FWACV) of gas served. As such, although blending hydrogen into the grid would increase the volumes of gas burned, the resulting consumer bills should be unchanged due to the lower calorific value of blended gas. The Government is working closely with gas networks to assess potential interactions between hydrogen blends and gas billing. Value for money will be a key factor in determining whether and/or how to enable the wider roll-out of blending into the gas network.</p>