Up until Martin’s campaign, the heinous act was almost completely legal in the UK. In the rare cases that it got reported, it was dealt with under voyeurism laws which meant perpetrators of upskirting wouldn't get charged because voyeurism laws only protect victims in 'private settings'.
The definition of private setting in this context didn't include an individual's body. If my body is in public, does it mean it's not solely mine? If the advent of technology makes it easier for predators to access my body and provides a new vehicle for harassment, shouldn't the lawmakers be on top of it and protect me?