We all I can say if that he didn't make it very clear -

'There is no general restriction on photography in public places, and there is no presumption of privacy for individuals in a public place. However, decisions may be made locally to restrict photography, for example, to protect children, or at organised events.'

Schools are private property and any event organized on private property would be covered. Well that goes without saying - He should say what he means in plain english then is all I can say, because an organised event in the street would not be enforeable. Talk about going around the houses, typical politician.