Angelic Energy are part of a group of energy companies operating under different brands, although you’d never know from a customer perspective. I didn’t receive any response initially, but after chasing them up I received this reply 21/3/18:
You emailed ourselves and our energy partners the exact same message multiple times, we replied to one and the rest were labelled as spam.
Neither ourselves nor our energy partners offer Economy 10 tariffs or meters. We don’t plan to in the future as they are being phased out as obolete.