Re: One tiny little country
Shopping centre - not a public place, but a publicly accessible place. You can take photographs, but there may be restrictions placed on you by the people that own the shopping centre. They may also ask you to leave for taking photographs, which is in their rights as the owners. Same goes (mostly) for a Tesco carpark, it's not public land, however if you are in a Tesco car park and someone takes your photo there is no expected level of privacy *because* it's a Tesco carpark.
Who manages the land is the relevant point, who *owns* the land is the relevant point.
I don't need to define the lens, I need to define my expected level of privacy, which I did. If you wish to go topless in your back garden, with nought but a 4 foot fence and maybe 10 metres from a public path, you have no expected level of privacy and I could arguably take a photo. However, if I rock up with a tripod, lighting gear and so on, never enter your garden, but set up over the fence, this would generally be considered intrusive and so any of *these* photos could be sued over.
It is a precariously fine line, especially since some people have the absurd assumption that as long as they are on private property, they can do much as they please - this would be why people have been cauthioned/prosecuted for answering the door in very little clothing, it still counts as indecent exposure even if they never leave thier home!!