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."
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ATM machines were affected, while people also reported problems using cards in shops.