Best answer by woz
my advice is to leave the DD in place and submit your leaving readings.
Some weeks later PP will send you a final bill, and you'll pay it. That's the easy way. There is no point in making a one off payment now, it will change when the final bill is submitted to you.
If you decide to cancel the dd you'll have to make the final payment manually.
I'm leaving for someone else... But due to inaccurate monthly estimates I have an outstanding amount owing on my account. How do I make a manual payment for this?