Unfortunately, pests are everywhere, always on the lookout for new places to nest and new sources of food. Such infestations mean it's time to look for professional pest control. London is particularly prone to pest issues, being an extensive built-up area that encompasses many of the environments that pests find attractive and useful: rivers, sewers, underground structures and tunnels, abandoned buildings and so on. London is a large conurbation, with a range of pest control companies available, and you need to consider carefully what to look for in a pest control supplier. Each region of London has its own providers, and while many will offer to cover the whole of the capital, you may want to consider choosing a supplier in your local borough who can reach you and deal with your issue relatively quickly.
The internet is the most obvious first port of call for finding a supplier in London. Simply carry out a search for 'pest control London' and you will immediately turn up a number of suppliers who you can then approach and request that they submit a proposal. It's always worth asking friends and family too, particularly if they've lived in London for some time - they're sure to know someone who has had to deal with vermin control. Finally, if you're a householder, consider asking around local businesses such as shops and pubs - anyone who handles food, in particular, will have to keep firmly on top of any vermin control issues they have at their premises