The following is taken from a Police website
Taking photos in a public place is not illegal. The only time an offence is committed is if the photographs being taken are considered to be indecent.
There is no law preventing people from taking photographs in public. This includes taking photos of other people’s children.
It is an offence to take indecent photographs.
If you are taking photographs from private land, you need to have the land owner’s permission.
Please note: No one has the right to ask a photographer to stop, to ask for a copy of the photos or to force them to delete the photographs, unless the images that have been taken are indecent.
If someone is consistently photographing you when you are in public against your will, it may be considered an issue of harassment or stalking. To find out more go to the Harassment and Stalking page.