Lincolnshire Assistant Chief Constable Roger Bannister says he took part in raids on suspected internet paedophiles yesterday.
"It's actually relatively straightforward to indentify men who, through an internet connection - often a laptop or another kind of computer at home, access these kinds of indecent images of children," he says.
"We identify them...and then we arrest the individual."
More top news
Top temperatures 10 Celsius (50F).
Britain and the European Commission reached agreement on a transition deal which will allow talks on the future trade relationship.
MPs called for better support for working fathers to help them care for their children.