St Marys Catholic school Chiswick

[binghk03]

HI there,
Does anyone have any experience of St Marys Primary School in Chiswick? My daughter has been offered a place in the nursery to start this September but I understand that progression through to reception from nursery is not guaranteed and she will have to apply again through the lottery system for reception next year?
Am keen to know as think will need to have a plan B. Does anyone know if attending the nursery puts her in any way in a better position for getting into reception?
Help!
Thanks a million.
K