Are councils using the electoral register for council tax purposes?

My notion that the billing authorities lift peoples signatures from voting ballots and dropped into credit agreements has no supporting evidence, it is just a theory... however the use of the electoral register for council tax purposes seems to be gaining evidence to support it!

'It does not matter much whether local authorities are or are not required by statute to keep something called a register. The practical needs of the situation will require them to have a point of reference and a database. If they do not keep a register themselves, they will no doubt make use of the one register that does exist—the electoral register, thereby prolonging and exacerbating that threat to civil rights already posed by the poll tax, which has induced hundreds of thousands of people to trade away their votes.'

https://hansard.parliament.uk/Commons/1991-11-11/debates/71b8efec-1ce3-4a49-92cf-236629d81a96/LocalGovernmentFinanceBill