Three reasons why rats are getting bigger in the UK

Environment
6 Aug 2025 • 8:06 PM MYT
The Independent
The Independent

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  • Rats in the UK are reportedly growing larger, with a supersized 22-inch rat recently captured in the Normanby area of Redcar and Cleveland, highlighting the trend.
  • Experts suggest the increase in size is primarily due to an abundance of high-calorie food from overflowing bins, food waste and milder winters, allowing rats to live longer.
  • Other contributing factors include weak sewer infrastructure and increasing resistance to common rodenticides.
  • Rats are highly adaptable creatures, evolving quickly to consume human junk food, with some populations showing changes in skull and teeth structure.
  • Pest control experts and ecologists confirm that well-fed, mature adult rats can reach significant sizes, thriving in conditions where food is plentiful and environmental pressures are reduced.

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