Old Town School problem?

Why are parents taking their kids out of Old Town School? Rumour has it that since Easter 4 families have moved their children from this school and moved them into local schools which do not appear to have such a glowing ofsted report. Perhaps in this day and age good results are not as important as a happy atmosphere. I had always thought of Old Town as a happy little school and looked forward to sending my children there but now I am having second thoughts and would be grateful for some reassurance.