I walked along Marylebone Road last night (6:30 pm) and experienced the traffic fumes first-hand. Truly awful. The most alarming thing is that this is the route I normally cycle along and I've never noticed the pollution in this way before (certainly due to my cognition being monopolised by situational dynamics - it's a busy road!). Makes me wonder whether the respiratory illness I'm suffering at the moment is related.

Clean air can't come soon enough to London.