According to the Telegraph siblings have to battle it out with the rest of them:
"Partially-selective schools will no longer be able to use the sibling rule giving priority in admissions to the brothers and sisters of existing pupils, under new rules being introduced by the Government.
The change will effect around 40 secondary schools which have been allowed to continue to select more than 10 per cent of their pupils by Labour and will not apply to specialist comprehensives choosing 10 per cent or fewer of their intake.
The new admissions code says the schools, such as Dame Alice Owen's in Potters Bar, Watford Grammer in Herts, and Graveney in Wandsworth, south-west London, "should" not use the sibling rule at all because places should be available to all who want to apply."
I was hoping my son this year would mean automatic entry next year for my daughter.
Looks like I will be around on this forum for another year!