I have just looked at the Upton Hall Website and it says:
1.1 These forms are available from the school or can be downloaded from the School Website and should be completed and returned to the school by Monday 13 July 2015.
Do you think that some of the children were given them at the primary schools or sent them at home? If so would seem odd that not all got them.
Hhowever I am wondering whether people have ctually been getting them themselves off the school website or school?
Or more likely they got them at an open day - often they are in the paperwork you get given at these events?
I can only suggest that you phone and ask the school if they would accept a late application.
Edited to add... sorry realised it must be Wirral rather than Upton Hall ?
1. Complete and return the Assessment Request Form to Wirral Local Authority by 31st May 2015. This applies to both Wirral and Cheshire residents. The Form can be down loaded from out web site when it becomes available.