British Citizenship Ceremony Invitation Letter not yet received

[Ditty]

Hi,
On 24th August, I received email confirmation that my application for British Citizenship has been successful, also saying that "the next step is to attend a British citizenship ceremony". Although it has only been a couple of weeks, I am yet to receive an invitation letter from the HO.
Reading a number of posts from other people here (in the same boat as me) I decided to contact both HO and my City Council. The HO advisor said that they have a backlog of Invitation Letters which they intend to clear by the end of October. Also the Council advisor confirmed they hadn't yet received my certificate but when they'd let me know when it arrives. They also said they are now doing group ceremonies once a month with no more that four people for each group.
Has anyone who have recently contacted HO got any updates about the Invitation Letters? Is there an order to the way the invitation letters are sent out or it is just in random?
Thanks

[CR001]

https://www.immigrationboards.com/briti ... -1060.html