At least if Smarty isnt great for you its easy enough to move away. I was in Leeds a couple of weeks ago and EE was fine for me mostly besides the faraday cage towers in the town, Leeds was a bit of a mess for both EE and voda signal, if you had signal though EE was fine.
I need to get an eSim three based network then I would have the full set 
I currently dont pay anything for my voda (which is technically a voxi) after a hellish time with voxi and I told them to delete my billing details as I didnt know if I would continue and the sim just keeps working… no payments taken and no messages, not paid anything since July I think.