Help 😁 St Marylebone school for girls waiting list movement

[Kalimero]

Does anyone know what has been the movement in the past for Open places in band A at St Marylebone?
I heard that band A has the most movement as the kids ending up in that band traditionally target Grammar and private schools.
How hopeful can we be holding currently spot 25 in band A Open place?

Thank you for your advice, it's great help.
Some say Open places band A have the most declines as they're held as backups at the beginning. We'll see 🤞🏼