On the 9th Dec, I emailed
NationalitySupportTeamFMT@homeoffice.gov.uk to ask when likely they'll be printing my certificate. Two days later (11th) I received the citizenship ceremony letter via email. Today (14th), I phoned
Nottingham City Council to ask if they got my certificate and he confirmed that they've received my certificate on Thursday but even though I got the ceremony invite from the HO, I can't book a ceremony yet because I have to wait for their letter (guy on the phone said to be posted today and could take up to 5 days to be received) which they have to assign me a date of my ceremony.
It's so frustrating that I have to wait for the council's invitation to attend the ceremony! Another thing is, last week's certificates are already been assigned until 7th Jan 2021.