Scottish Power? Good luck
@Accy cyclist , I escaped their greedy clutches years ago, but maybe things have improved. The clue is in the name; they impose a 50% surcharge on anyone with an Ingerlund flag on their avatar. I wouldn't go back to them if they were the last energy provider on the planet. Well, not unless the alternative was NPower - now there is a bunch of robbing, couldn't care less about our customers shower of bar stewards. They seem to think you want to bank with them rather than just pay for energy you use.
On a positive note, I am now with Octopus energy, have been for 2 or 3 years now, and have found them to be good to deal with, reasonably easy to understand billing system, and fair tariffs.