I just found i've been paying £1 each time I use the new billing payment method of being able to pay your bill with your card.
I don't check my bank statement as much as I should do and found that some of my bills are for like 52p, 89p, £1.20 [I haven't been very active] but i've been paying £1 for each of these payments.
Just posting so that you know, so you don't waste money like i've been doing. I'm such an idiot.