Re: Damned if you do, damned if you don't.
"I know it's a nightmare of law regarding photography, ie. commercial vs non-commercial differences, people in public (public, so "okay" but ECHR "reasonable expectation of privacy" can apply = messy!)."
If you are on public property/access, there's no difference between commercial and non-commercial photography. The courts have ruled many times that there is no expectation of privacy in public. If you leave your curtains open, there might not even be a reasonable expectation of privacy in your own home depending on the circumstances. There was a case about a photographer getting some snaps of the people in an adjacent high-rise where the photographer won and the people photographed admonish to close the drapes if they don't want to be recorded prancing around in the buff.