That is not strictly true.

One can only sell images of people without consent for 'fair use' news items.

IE , if an image is part of a news story.

If you take photos of people and sell them through an agency, or an image library as I do, for advertising etc, you have to get all people in the image to sign a model disclaimer form in which they agree to use of their image for your profit.

This also applies to both interior and exterior views of , what the law terms 'recognisable' buildings. That would mean mainly shop frontage with company names etc on them or similar, and certian historical landmarks.
It also includes many church buildings, but note this only applies when the objective is to sell the image.

You cannot sell those images in the UK, or anywhere in the world, without having the signed disclaimers accompanying the files.