I work in energy regulation, you don't have to worry about them switching it of. It's actually illegal to do at the moment and they will just switch you to prepay unless you are vulnerable. (Tell em you got kids under 5)
Smart meters help my job understand demand and supply. But not even I have one to be honest and when I used to be a metering specialist, we use to change then for people.
Fun fact, there is currently a shortage of meters for some companies (WINK)
go with a small supplier that has a low stock, they will happily give you a legacy meter.
Whe buying the house, add the condition you wish to choose your own starting supplier and they will let you.
It's your home.
Following this advice, please submit your meter readings!
Ps smart meters only share meter reading data, all meters share this information via a secure dataflow network. We are made to sign very strict documents to not breach this.
Any data breaches, easy lawsuit, quick money for you haha. But no personal Information is held on the meters.