He said: "Transport for London operates two grinding trains, both of which are the only approved grinding trains that can operate on its London Underground network.

Source: https://www.mylondon.news/news/transport/how-noisy-london-underground-lines-27986202

Now, one young entrepreneur is creating an app which allows Londoners to choose the least polluted route along the London Underground network.

Source: https://londonist.com/london/transport/air-pollution-tube-lines-particles-app

The train station is on the TfL Underground network, as well as having diverse car and bus routes into London.

Source: https://www.essexlive.news/news/essex-news/essex-town-once-named-among-8840216