Case Studies




Cleankill Pest Control was called to Blueberry PR’s offices in a Grade II listed farmhouse in rural Sussex after staff reported seeing large wasp-like insects entering the property via the fireplace. These wasp-like creatures were accessing the chimney through tiny gaps in the brickwork. The problem became so bad, it forced staff to vacate the offices.


Cleankill Pest Control quickly identified the problem as a hornet’s nest in a closed off chimney. Director Jon Whitehead noted it was unusual to find hornet’s nests in chimneys – in fact, this was the first one he had seen in over 30 years of being a pest controller.

Rats and mice at equestrian centre in East Sussex

The Problem

Cleankill Pest Control was called to a residential property and equestrian centre in East Sussex.  The owner, Andy Melville, reported rats had been seen taking food from the bird table and digging burrows under the table. The bird table was situated near a pond in the large garden attached to the premises. In addition to this, mice were also found to be eating animal feed in the storage cupboards.

Mouse problem in City of London

The Problem

Staff working in the financial services industry, in prestigious offices on Cannon Street in the City of London, began complaining to the building manager when they started seeing mice inside the building.

This was a very large problem, spread over several floors. The problem had the potential to become very serious if immediate action was not taken. A team from Cleankill Pest Control was dispatched to investigate and traced the source of the infestation to the underground car park and loading bays.

The Solution

The problem

Parakeets have been causing havoc in a large development of flats above the main shopping district in Feltham, Middlesex.

After resident had complained about noises above their bathroom ceiling. Cleankill Pest Control received an enquiry from the site manager and carried out an inspection.

Ring-neck and Monk parakeet numbers have increased in recent years and are successfully living wild in London and the South East. Classified as agricultural and horticultural pests by Natural England in 2010, these birds do still enjoy the legal protection afforded wild birds despite becoming a menace in some places.

The solution

Raised flooring in office buildings - designed to create space for ducting and cables - provides the perfect space for mice. They can move around the building without being seen and then emerge through openings such as risers used to house electrical sockets.

Cleankill responded to a call from a customer with offices near London Bridge after staff saw mice running around on the carpet.

To help establish the extent of the infestation, a motion-sensitive camera was placed under the floor near one of the risers for two and a half days.

Cleankill Director Clive Bury explains: “We needed to find out whether it was a random problem or an on-going infestation. The floor area was extensive – around 400 square metres – so we chose two locations for the cameras.”

A rat trying to hide

Make sure your building is well maintained and drain pipes are capped off is the warning from Cleankill Environmental Services to London premises managers.

The managers of a commercial office building in Holborn, London, called in Cleankill after staff complained of noises coming from behind a wall.

Cleankill technicians were horrified to find a large colony of rats was coming in and out of the building through an uncovered drain that led directly into the London sewer network. If the problem had been left any longer the rats could have entered the building in large numbers and caused extensive damage to cables and pipes as well as contaminating everything they touched.

Filter Flies in London

Many office blocks in London have restaurants and shops on the ground floor which can present additional challenges to FMs if tenants do not take steps to keep their areas hygienic and pest free.

This was the case with an upmarket Italian restaurant in central London. Cleankill was called to deal with a serious fly infestation which was spreading through a void into the toilets and then into the eating areas. They were identified as filter flies – small flies about the size of fruit flies – commonly found at sewage farms which provide the ideal breeding conditions.

Bed bug

When Cleankill was called to a bed bug problem in South Kensington, London, technicians found one of the worst infestations they had ever encountered.

The building they were called to was made up of bedsits which all had sitting tenants. One of the bedsits (an area of approximately 14 feet by 16 feet) was occupied by a man in his mid-70s who lived in one room with his bed, wardrobe and armchair – all of which were heavily infested.

Cleankill technicians believe that the bed bugs had been in residence and spreading around the bedsit for several months. The tenant eventually reported the problem, when he had had enough, to his landlord who called Cleankill for help.

When it comes to conserving heritage, Cleankill has the knowledge, expertise and equipment to treat historic artefacts carefully, sensitively and effectively. So we were delighted to help the Bluebell Railway team when they called us to solve a serious infestation of Common Clothes Moth (Tineola bisselliella).

After allowing a major pest control company a year to sort out a mouse problem, the final straw came for a department store when a creature jumped from a suit pocket in front of a customer.

Part of the problem was the building’s construction: six floors of suspended ceilings – perfect hiding places for mice and other rodents - and a large number of cupboards stacked high with stock. Mice were living and breeding in the ceilings and cupboards unnoticed.

At night mice would run riot and in the morning staff would find trails of droppings around the store, including the restaurant and food preparation areas. Mice were also living in redundant equipment.