I think ya mite be able to get a George Wilson in with a bit of luck, e.on don't carry e6 credit, neither did bt when iwas there.they wouldn't dig up your drive they'd do it in the middle of the road where the main is.
If you drop the meter, he will have loads more in the back lol, the chance of getting it moved outside is very slim, as you have a inch service by the look of it, they can push plastic 3/4 straight thru it, I doubt it will ever move unless you pay for it lol
Well your not gonna get free gas forever , they ain't many e6 meters getting fitted, so it'll be cupboard made bigger, or potentially disconnection of your meter .
touch the 2 little screws on the smart meter that should fire it up a bigger picture of the whole installation would be better , ive never seen one wired with 4 wires , we only use 3