Northumberland Park School Class of 1972 Reunion

I am organising a reunion for the first intake of Northumberland Park School, which was set up in 1972. Mr. Pert was the headmaster. If you were in that year please contact me. If you know of any one who was in that year, they would be 56/57 years of age please ask them to contact me. So far I have 30 on the guest list, plus handful of teachers. There are about another 150 students that I still need to find. Any help would be greatly appreciated.