Are you sure about that? here the mantra has been in previous legislation "information in the public interest". In other words journalists uncovering misdeeds committed by persons or organisations. Its very hard to see how this line of reasoning could be extended to street photography.
Ultimately it is enforced here through the rather toothless, slow and understaffed ICO, you know that organisation that didn't get in to Cambridge Analytica until about a week after the story had gone round the world. For this reason and those debated in this thread I don't expect anything much different to happen for sometime yet.