Nasty smell in the air - Perry Vale

Woke up this morning to find a nasty smell in the air, akin to stale vomit. I can smell it both in the back garden and at the front of the house. Perry Vale area. Anyone else?

I was aware of this exact same smell the other evening when I got off the overground at FH. Bizarrely I could also smell it in east London earlier in the evening as I left work - I put it down to some strange heat/pollution thing but stale vomit was the exact smell. Unpleasant!