Avoid this outfit at all costs.
They kept sending me bills for a vacant property, regardless of the meter readings which I kept submitting, & which didn't change.
I kept querying this for a year until they finally decided that it was for a monthly standing charge.
Even now, after the property is no longer mine, & the account is closed, I've just received another bill.
Their customer service skills are appalling, their staff have little knowledge & no-one gives you a definitive answer to your questions.