Re: Naughty list
Don't worry. I had a 'todoo' with them this week.
Had a legitimate £2500 Bill for 2018/19 so I paid it. I also had a 'pre-demand for 2019/20' which I declared not required [what's the actual wording??] Due to a change of circumstances.
Three weeks after paying and getting the confirmation of the change to 19/20 - I get a statement requesting £4500 for 18/19 and prepayment for 19/20.....
Cue a 30 minute wait in the queue to tell them about long walks off short planks....