This was up from 94 incidents among 25 forces with available data during 2018, the year before the ban was introduced, and up from 78 reports over the two-year period from April 2015 to April 2017.

The new data shows the vast majority of incidents between April and October 2019 involved female victims, with women targeted in schools, shopping centres and other public places.

Campaigners previously complained that the lack of a specific upskirting law meant police were unsure how to deal with allegations, with many crimes going unreported as a result.

Gina Martin – who led the campaign against upskirting after two men who took a picture up her skirt at the 2017 British Summer Time festival in Hyde Park went unpunished – praised the impact of the law on bringing perpetrators to justice.

She said: “The Voyeurism Act only came into use eight months ago and the difference in charges and reporting is already up greatly. Among those who were charged was a convicted paedophile and a man who police subsequently found had 250,000 indecent images of children.

Ms Martin, a writer and activist, added: “Upskirting doesn’t exist in a vacuum. Sexual assault and violence is all linked, and I’m just so happy this law is holding those who perpetrate it accountable.”