The Confirmation Statement (CS01) was amended in line with the requirements of the Anti-Money Laundering legislation on 26th June 2017.
From this date, it was no longer possible to advise, change or withdraw PSC details on the CS01. PSC related filing are now required to be advised on the relevant statutory forms PSC01 to PSC09.
All relevant current schemas for these can be found here:
Please note that the CS01 is still used for advising SIC and shareholder changes.
I hope this clarifies.