Atmos spotted early on

In the photo above you can see an "Atmos" sticker on the cab that showed up for the woman Donna was interviewing when she suddenly melted into adipose babies. "Atmos" will figure into the "The Sontaran Strategem" and "The Poison sky" episodes and perhaps the finale itself.
The episode description of TSS reads : Martha Jones summons the Doctor back to modern-day Earth, but an old enemy lies in wait, as Russell T Davies's Bafta Award-winning time-travelling drama continues. With the mysterious ATMOS devices spreading across the world, Donna discovers that even her own family is not safe from the alien threat – but is it too late to save them?
While Donna meets Martha Jones for the first time, the Doctor encounters a longtime enemy...

I do like how tubby old rusty sprinkles little bits thru the early episodes.