No traces of coronavirus have been found on surfaces and in the air on the London Underground or on buses in the capital city, scientists have said. Experts from Imperial College London have been carrying out monthly tests on the network, mimicking a passenger journey and taking swabs from escalators, handrails, bus shelters and Oyster Card readers. https://web.archive.org/web/20201105170350/https://www.independent.co.uk/news/uk/home-news/coronavirus-london-tube-buses-tfl-research-b1619402.html