British people won't stop to help says NSPCC

The NSPCC says it's shocking that British people won't stop to help.  Yesterday in an experiment two young children in London's Victoria place pretended to be lost and alone while hidden cameras watched, 616 people passed them by and only one 1 stopped to ask what was wrong.
As an experiment it fails on several grounds, firstly how many of the people who went past were actually British?  This is London remember with a large foreign tourist element, many of whom are used to seeing young children playing alone. 
Secondly I can't say I'm supprised by British people passing them by, sadly in this country (UK)  if you speak to a child your instantly branded a paedofile often with aggression from parents and onlookers, so people tend to avoid them    Not helped by heavy handed policing, recently a man who took pictures of children vandalising cars was arrested as a possible paedofile (remember it's not actually an offence in the uk to photograph children, it's only indecent photographs that are an offence, not that most of the police seem to know it)
And now if people see a child alone they won't think I wonder if he/she is lost, no they'll wonder who is running this experiment and just walk past.