英國係世界上(特別係西方)好重privacy 嘅國家
公眾地方只包括街道
商場、車站、球場呢啲都照當「私人地方」
唔似香港咁只計單位入面嘅私人空間
People are able to take pictures in all public places.
Under the Protection from Harassment Act 1997, you can be prosecuted if you are threatening, stalking, intimidating, or causing distress to someone to obtain their photograph.
You must also be careful that where you are shooting these images is definitely a public space, as many areas that you may think are public are in actual fact privately owned.
For example, many shopping centres, museums, art galleries, public attractions, churches etc are on private land and you would need the permission of the landowner in order to be able to take pictures in these places, otherwise, it could be considered trespassing.
https://www.thesun.co.uk/tech/21081632/illegal-video-record-without-consent-law/