Having different companies is a big con anyway. Whichever you are with you are getting exactly the same electricity or gas through exactly the same wires and pipes. Changing 'fuel' supplier is really just changing 'fuel bill' supplier. I have better things to occupy my time than searching all the bill suppliers to find an introductory offer to change to, just for one year before the price goes up unless I go through the whole process again.

I won't be bothering with a 'smart(?)' meter. It's the things that produce heat that put the bills up so I'll just use less hot water and not bother with ironing except for special occasions.