Update ***
Eligibility criteria: UKM ( By descent )
Nationality: American
Applying from: UK
Method of application: Paperform
Date sent to UKVI - 27th Dec 2018 ( next day , tracked service with P/O)
UKVI in Liverpool received my Form & Docs - 28th Dec 2018
Payment method: Debit Card
Date money gone off account: Tuesday 29th 2019
Email with case number : Wednesday 30th Jan 2019
Date of acknowledgement by letter : Letter dated 29th Jan 2019, received in post Friday 1st Feb 2019
Date of letter requesting biometrics: Letter dated 29th Jan 2019, received in post Friday 1st Feb 2019
Biometrics done: Friday 1st Feb 2019
Requested documents be Returned: Thursday 7th Feb 2019
Documents arrived back : Thursday 14th Feb 2019
Date of approval: Letter dated 1st March 2019 ( letter arrived 8th March 2019)
Date of ceremony: Booked for 17th April 2019
Ceremony took place today

17th April 2019.
Date applied for passports: ----
It happened

Today, I had my ceremony and I'm now a British Citizen
The emotions I had before , during and after the ceremony was unbelievable. It was done beautifully with others, but bits on own too. Will apply for passport in May after my holiday as I have been verbally told to send in my certificate and current passport in with application. I have also been made aware that it's likely 1st adult passports will need a identity interview in the letter that was in my folder they gave. ( I'm in the UK and did this process , British by Descent myself).
When your ceremony comes enjoy every minute of it, don't worry if there are tears. It's a very special moment.