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rodents overrun parliament in london

Why Have Rodents Overrun Parliament?

Rodents overrun parliament! So claims a recent national newspaper headline. Turns out it’s true. For example, did you know that in 2018, parliament spent £110,000 on pest control alone. The bulk of this money went towards eliminating rodents. But why have rodents overrun parliament? There are several reasons for this.

How badly have rodents overrun parliament?

According to The news story, this pest situation is almost completely out of control. Dozens of sightings are reported daily, and peers have even reported mice in their offices. To solve this problem, a variety of solutions are in use. These include the introduction of cats into the building and traps such as glue boards. Along with this, 1,700 mice bait stations have been placed, as well as 102 rat stations. This is in addition to electronic fly zappers.

mouse scavenging

And it’s not only rodents, but other pests as well. Birds, such as pigeons, are also a problem for Westminster. These birds roost on the houses of parliament and damage the stonework with their faeces. To solve this issue, pest controllers are using hawks to scare away these birds (at a cost of £11,000.) It seems as if parliament also has an issue with moths. According to the article, more than £1,380 was spent on anti-moth measures along with another £49,396 for general pest control measures.

But why have pests become such a big problem?

The main reason is simply because the parliament buildings are old. In fact, the history of these buildings dates back hundreds of years. What this essentially means, is that there are hundreds of nooks and crannies. There are also dozens and dozens of cracks and entry points for rodents to get in. These factors don’r exactly deter mice and other rodents from moving about the building easily and finding places to hide and breed.

rat on red wool

What you also have to understand is that the building is enormous. This makes it extraordinarily difficult to track down and exterminate all the rodents present. Another reason why rodents overrun parliament is because the building has several bars, along with various restaurants and canteens. These serve food which obviously attracts rodents. Restaurants also generate food waste, which makes the problem of mice and rats invading worse.

In addition to all the above, the building has a longstanding renovation and restoration project going on. This means that rodents are being disturbed from their hiding places, and this is why they are being spotted more often.


Sally has been writing on the subject of pest control for 4 years. She always carries out extensive and in depth research and always tries to bring you the most up to date, interesting topics.

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