Stuart Halliday, owner of Essex-based Kill and Cure Pest Control, said Brits only have themselves to blame for the increasingly large rats that are sweeping the country.
Mr Halliday told The Sun: “The main thing causing them to get bigger is their food sources; like humans, you get some big humans and you get some small.
“But if you’re eating really well and you’re doing really well and there’s nothing much about to knock you on the head you can get bigger – and then your babies can get bigger.
“These rats have got all the food they want from people putting fats down the drain which then turns into fatbergs. It’s also because of people flushing food they don’t want.
“If people want to stop super rats for one stop putting so much food in the sewer. Stop letting food go down the drain.”