Congratulations Fazioligirl! And thank you everyone for the good luck wishes..
Because I am crazy, I actually started preparing for my LTCL originally more than 5 years ago, and was going to skip ATCL- but I got bored with practising those pieces, so decided to prepare an ATCL programme.
My proposed LTCL programme (which I had to get approved as 2/5 are off-piste) is
Bach - Prelude & Fugue in C# BWV 848 from WTC book 1
Mozart - Sonata in A minor K310
Chopin - Nocturne in F Op 15 No 1
Chopin - Polonaise in A flat Op 53
Menotti - Ricercare and Toccata
I came up with this programme some years ago when I was extremely annoyed with my job (I am a computer programmer in real life) and thought I might want to become an accompanist. I couldn't play most of it, and I was prepared for my teacher to tell me to shove off. She did frown and tell me that if I wanted to play that programme I would have to play a certain number of Chopin Etudes in a certain order. I said OK, and we worked on them for a couple of years, and I was able to start learning the notes of the Polonaise a few years ago. I can play through it, but it needs a lot of polishing- everything else, I've performed multiple times and I know I can play.
If all goes well I'll take it some time next year.