British Gas only install SMART METERS.
They will lie to you when you request no smart meter.
As your Gas meter connects via Bluetooth to your Electric meter (If you have a smart electric meter).
So be prepared on a smart meter of a complete profile of usage.

After 45 minutes and transferred to three departments British gas cannot provide tariffs for direct debit.
But they can instigate a illegal blind contract for direct debits.
No information on website for tariffs for direct debit.
The British gas reply shows it's true face by not publishing all direct debit tariffs.
Who enters a blind direct debit contract?.
Answer A FOOL!!!.