I have a better example. I am FTRS and so my FTRS pay is paid through the usual agents in Wales, whilst my pension is paid through a separate agency in (I think) Bournemouth.
These 2 agencies do not - apparently - speak to each other or coordinate their work. I accept that I should have checked, but I trusted the system (of course they'll look after my interests - they're professionals).
However, it transpired earlier this year that the people paying my pension had been paying it (from the start) minus the basic rate of tax, despite the fact that my FTRS pay was taxed (correctly) on the normal sliding scale, and that my pension should - therefore - have been taxed at 40%.
I have just, therefore, had to pay a bill for just under £7000!!!
As I said, I should theoretically have checked myself, but I am too trusting apparently.
Best you other FTRS check your tax bills.