So having been with sse a while now they recently updated the smart meters, knowing I was going away I had plenty of credit to cover until I got home. So yesterday I received a letter saying I owed them 22 pounds. Luckily I'm not an idiot and checked it against my bank statement. So after an hour on the phone to get through and speak to someone it was removed. Just a heads up for anyone else who might have received the same letter.