It’s estimated that rodents are responsible for depleting one-fifth of the global food supply every year; this accumulates to a financial loss of around £11 million a year which is a major loss for food companies. Additionally the environmental health organisation doesn’t take rat or mice activity lightly with businesses being charged sums of as much as £500,000 due to stock being covered in droppings or to simply selling food that was damaged. With the amount of rodents increasing by 10% each year, the U.K. alone has hit a figure of around 200 million; some infestations have taken over homes to the point where tenants have been forced to move out, some have put companies out of business. Overall, rodents are by far the most common perpetrators in the pest industry within the U.K. and any issue regarding them should not be taken lightly.


There are 2 types of species of rats that are common throughout the U.K; in London the most common is the brown rat.

Brown rat (Rattus norvegicus)

Ground living and burrowing (sometimes found in sewers)
5 to 10 young per litter, and have between 3-6 litters a year
Reach sexual maturity 10-12 weeks after birth
30g of food a day
Thicker body compared to a black rat
Up to 40cm in length

Black rat (Rattus rattus)

Good climbers
5 to 10 young per litter, and have between 3-6 litters a year
Gestation period lasts for 3 weeks
Reach sexual maturity between 12-16 weeks after birth
Usually found in ports
Slender body
15g of food a day is enough


Just like rats, there are only two types of mice which are common throughout the U.K. The field mouse which is usually found in rural areas and the house mouse which you can usually catch in an underground stations late at night around London.

House mouse (Mus musculus)

50 to 80 droppings a day
Gestation period of 19-21 days
Excellent climbers
Can vertically jump 42cm
Require little water
Can squeeze through a hole the size of a biro pen
5 to 10 litters a year of 3-14 babies

Field/Wood (Apodemus sylvaticus)

5 to 10 litter a year of 3-14 babies
Gestation period of 19-21 days
Can vertically jump 46cm



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