The Information Commisioners Office has a lot of guidance on this kind of thing, mainly geared up for CCTV usage and you have to learn it all if you are a CCTV Operator.
For example, I can't put a camera on the side of my building if it captures people walking up and down the street and that come no where near the building. I can only keep it for a period of time that is appropriate (i.e. how long do you think it'd take you to work out a crime had been commited - don't keep it for longer than that) and you have to respecet everyones right to see footage of themselves.
That's right, you can write to your local Supermarket and request a copy of any footage that contains you. They'll charge a £5 admin fee or something but it's your right. Likewise you could write to your local council and request a copy of all footage of you walking around town.
If you see it and suspect that they shouldn't have it, for example it's more than a few months old, you can speak to the ICO and ask them to destroy it.
And most importantly, they can't use it for any kind of commercial gain.Whether or not the same applies in her country is a different matter.