Unfortunately, pests are everywhere, always watching for new areas to nest and new sources of food. Such infestations mean now is the time to hunt for skilled pest control. London is quite susceptible to pest issues, being a wide built-up area which encompasses tons of the environment that pests find helpful and appealing: ponds, sewers, underground structures and tunnels, abandoned buildings etc.
London is a massive conurbation, with an assortment of pest control companies easily available, and you also wish to think about carefully just what to hunt for in a pest control supplier. Every region of London has its own providers, and while many will supply to cover each of the funds, you may want to consider picking a supplier on the local borough that will reach you and handle your issue relatively quickly.
The net has become the most obvious first port of call for finding a supplier in London. Simply execute a search for 'pest control London' and you will instantly develop a selection of providers that you can then plan and ask that they submit a proposal. It's definitely worth asking family members and friends also, particularly if they've lived in London for some time – they are certain to understand somebody who has had to control vermin control.
In the long run, if you're a householder, consider asking around local companies like shops and pubs – anyone who manages food, especially, may want to keep firmly jointly with any vermin control issues they have within their assumptions.