News on the wire is that there has been an “evacuation” of (some portion of) Red Bee in White City.
I don’t know anything further, but it would tally with the channels that seem to be affected.
ITV Region: ITV News Central
BBC Region: BBC Midlands Today
Thanks [mention]Larry the Loafer[/mention] , just seen the breakdown thread.
4seven seems okay, though of course the C4 +1 channels are going to effectively replay the entire breakdown soon when they get there. Which is always fun.
E4 and Film 4 are still on air, but More 4 is off air with a black screen and some funny lines appearing.
Edit: Film 4 are now off air with the screen flickering.
5SELECT currently completely black.
5USA on with a screen with half of its logo.
E4 Adverts up and running again.
More4 off air.
Channel 4 still on F1 endcap.
4Music still off air.
5Star up and running.
Edit:
KISS off air.
Both BOX channels off air.
5USA, Paramount and 5SELECT back on air.
Edit 2:
Channel 5 back on air.
More4 back on air.
C4 and 4Music are the only ones still off air.
<r>Does Dhar Mann deserve a linear broadcast? <E>

</E></r>
Channel 5+1 now on a breakdown caption.
Box Network is all down (Magic, Kerrang, Box+ etc.)
They're both women and that trumps regionality; ITV guidelines
ITV Region: ITV News Calendar
BBC Region: BBC Look North (E Yorks)
As noted, all Box Plus Network channels are off-air, but the graphics are still going out as normal.
Watching on E4+1, an ident played out silently with the CA, seemed to be glitching, then into a silent RAF sponsor sting and froze. Now it's cut to black and flickers with the DOG on screen.
Film 4+1 seems to be a bit stuttery every now and again playing The Simpsons Movie. I presume this persisted until it froze on the credits.
ITV Region: ---None Selected---
BBC Region: ---None Selected---
GB News and London Live come from there too, have both of their viewers noticed any problems?
It's not just Channel 4 and Channel 5, BT Sport also comes from White City and it too is down. BT Sport 3 is reportedly showing a "BT Sport" slide with what appears to be buzzing.
EDIT: Someone's already mentioned it in the first page.
More 4 is now showing adverts but when the adverts finished it goes back to a black screen.
The Box is playing its UK Hot List graphics as normal, albeit without any videos.
They're both women and that trumps regionality; ITV guidelines