The online reporting does work if you have a TM30 accepted by the new system. PKK province 3 days for approval, same as before, BKK, people say 8 to 10 days recently
I did this at CW last year, suggest to ask your employer HR if they are able to support you with post dated termination letter and the 7 day request before you change the reason of your extension from working to retirement. Some IO ask for tax filings from the employer in addition to two months 800K seasoned for NonO in addition to all the other docs