Many parents may be thinking about the possible cut-off score needed for Tiffins. Laretta made some interesting calculations for TGS on another thread.
It does depend on how many girls sit the test, but if we work it out with this years figure (1468), I think it goes as follows.
450/1468 X 100 =top 30.65 % so girls would need to achieve a score at around the 70th percentile (or more) i.e. 108 per test according to the NFER table or 216 combined score.
So in answer to your question around 216 ( i think) obviously this number could go up or down depending on the number of entrants.
Tiffin do not give out rank order information, therefore girls up to this year have only been given their score. Not sure if they'll give it out this time as they might tell you your rank or they might just tell you you're in the top 450, they would not necessarily need to tell people how much they have actually scored - who knows?