Time Traveler Lost In Fog?

I was scrolling through some old photographs of foggy old London when I came across this very striking picture. Upon a closer examination I thought "Is that some one using a mobile phone?".
Check out the chap next to the dustcart, or whatever that wheeled vehcile is. It looks as though he is having a chat on a portable device.
                A Time Traveler lost in a London fog?