Anyone hear warning siren 03:30 Monday morning?

[Office-SE15]

I can hear an old style warning siren ... But not sure what is is or where it's comming from

[copleston_charlie]

Yes, very freaky. According to the twittetverse, there's a massive fire in north Greenwich and perhaps this is yelling us to close our windows. No verification of this.

[M&Ms]

So relieved to read this. i was starting to question my hearing. The siren has been going off for ages and I have just closed all my windows as there is a weird smell outside.

[tomo]

Large factory fire in Greenwich

http://www.itv.com/news/story/2012-05-28/large-factory-fire-in-london/

[Undisputedtruth]

That smell is Chlorine and is toxic. Make sure you close your window.

[pommie]

yeah i heard this as well this morning, thought i was going mad (lack of sleep due to new baby!)

[Belle]

me too - up feeding baby, heard it and thought was like an air raid siren. Hmm - all our windows were open though!

[the-e-dealer]

I woke thismorning quite unwell how are we supposed to know siren means shut windows ?

[mattydj]

http://www.motifake.com/image/demotivational-poster/small/1009/duck-and-cover-no-worries-demotivational-poster-1283977742.jpg

[bluebell04]

we heard it in Bermondsey!