Hi, I have worked as a nanny where boys I have cared for attended Dulwich prep, it is a fantastic school, superb facilities, dedicated teachers! Private school is unfortunately not an option for my daughter, if we could afford it, I would apply for Dulwich prep, they take girls for one year but it would be valuable. If your son is turning 4 in April you might need to get his name down now fo sept 2012. Best of luck x