One in five of millions of people watch pornography during the working day, according to the UK’s media watchdog.

The Ofcom study revealed that 21 per cent of 13.8 million people watch online pornography between 9am and 5.30pm for an average of 55 minutes.

The regulator said it was unclear whether this was because of more people working from home as there were not previous figures to compare with.

Adults only spent more time watching pornography between midnight and 9am, with 59 minutes on average, according to the study. Seventy-three per cent of those doing so were men.