Thank you and apologies.
I did a U-turn where it was prohibited.
Sorry, not enough. Please describe direction of travel and where you made the U-turn. We need detail like this to make sure the PCN is correct. It is very unwise of us to guess what you did, you need to tell us.
As this is a TfL PCN, we can't see the video unless you obtain it from TfL in the form of a DVD. Yes, TfL are in the dark ages unlike the councils. If you call them, they'll send one out and put the process on hold for about 14 days.