The ceremony is quite lovely, if you're into that sort of thing (I am

). You'll be able to bring up to two guests. Have them take pics when you accept your certificate!
There'll also be an attending guest of honour with whom you'll be able to do the photo thing, too.
I know it's silly advice, but enjoy the experience. You'll only become a citizen of the UK
once, after all, and it's rather special.
The fun bit is up ahead: acquiring your British passport. They're more stringent about that than they are about naturalisation, and UK citizens don't have a 'right' to a passport.
Where with the naturalisation you needed two referees who met different criteria, with the passport application you'll need one who meets the following:
https://www.gov.uk/confirm-identity-online-for-passport-application
For us, the friend of ours that they accepted for the naturalisation process they wouldn't accept for the passport application. We concluded that they must hate journalists
Our next choice was the director of a consultancy, which was nigh on instantly accepted. Rather glad for that, too, because he's sentimentally special to us, so it means a lot that he ended up being our referee and part of our citizenship application.
Our third choice was going to be husband's optician. After which the pickings were going to become extremely slim
Also, when you receive your Certificate of Naturalisation, be sure that it exactly states your place of birth on it (i.e. town
and country).
For whatever reason, mine omitted the town. Much groaning ensued, along with a panic of having to deal with South African Home Affairs to get a birth certificate and the inordinate length of time that would take to arrive.
Thank ****, however, I anticipated that years beforehand and had one at hand. So the certificate was easily amended and corrected.
But yep. The relief is palpable. I'm happy for you!