Right, we should get confirmation tomorrow along with songs, but this looks correct:
Week 1 Dances
Ainsley & Natalie - Tango (Ainsley on Talksport)
Anita & Gleb - Cha-Cha-Cha or Waltz? (First Steps video)
Anthony & Oti - Jive (Sun article)
Carol & Pasha - Cha-Cha-Cha (TV Times article)
Daniel & Kristina - Waltz (First Steps video)
Georgia & Giovanni - Jive (First Steps video)
Helen & Aljaz - Waltz (First Steps compilation video 2)
Iwan & Ola - Tango (First Steps compilation video 2)
Jamelia & Tristan - Waltz (probable from First Steps video)
Jay & Aliona - Cha-Cha-Cha (First Steps compilation video 1)
Jeremy & Karen - Cha-Cha-Cha (First Steps video)
Katie & Anton - Jive (First Steps compilation video 1)
Kellie & Kevin - Tango (First Steps video)
Kirsty & Brendan - Waltz (First Steps video & Brendan's twitter)
Peter & Janette - Cha-Cha-Cha (First Steps video)
2013: 6 Cha-Cha-Chas, 4 Waltzes, 3 Tangos, 2 Jives
2014: 6 Cha-Cha-Chas, 3 Waltzes, 3 Tangos, 3 Jives
2015 (so far): 4 Cha-Cha-Chas, 4 Waltzes, 3 Tangos, 3 Jives
On the basis of that I am going to say that Anita has the Cha-Cha-Cha.
Week 2 Dances - Known Information
Ainsley & Natalie - latin
Anita & Gleb - Waltz or Cha-Cha-Cha, whichever she doesn't have this week
Anthony & Oti - ballroom
Carol & Pasha - ballroom
Daniel & Kristina - latin
Georgia & Giovanni - ballroom
Helen & Aljaz - latin
Iwan & Ola - latin
Jamelia & Tristan - latin
Jay & Aliona - ballroom
Jeremy & Karen - ballroom
Katie & Anton - ballroom
Kellie & Kevin - latin
Kirsty & Brendan - latin
Peter & Janette - ballroom
I am expecting the week 2 dances to be the same as the last two years: American Smooth, Foxtrot, Tango or Waltz for ballroom and Cha-Cha-Cha, Charleston or Salsa for latin.