No.
Smart meters are not mandatory, it's a government initiative and the government have said they're not compulsory, it's not down to the supplier despite what they may tell you.
You can refuse to have one fitted and there's nothing they can do.
The roll out of smart meters serves no purpose for the consumer at all, it's not for our benefit, it's for 'their' benefit.
When you heard the early conspiracy theory's about them being able to turn your meter off remotely (no longer needing a court order to enter your home to gain access) or they can be hacked, it's all true.
We have smart meters, smart TV's, smart fridges, smart washers.
In years to come when these are all connected to the smart grid they will be able to turn your whole house off remotely.
Smart meters are the first real step towards the smart grid and George Orwell type shit, it's in nobody's best interests to have one.
Stay well away.