Well, I came back from my long weekend in London on Monday, and I noticed on Monday that my asthma was starting to flare up - I was sitting drinking a coffee in a cafe in Russell Square and during that time I needed 6 or 7 puffs of inhaler.
I'd been doing well - we did masses of walking and I coped well with it.
But now I'm wondering - do you think it's just coincidence? I can't help but think that it's related to the air quality. After all, if I spend any time in London I notice that when I blow my nose it's black (sorry, gross and prob TMI), so I can' help but think it might be related.