Hi.
I'm new here so i can't post extra topic with my case.
Found this topic to be similar.
On 8th of July 2011 at 23:15 I've seen round shape object moving across the sky with speed of the plane (100-200km/h) in about 1 km distance.
Im living in Kingston Area/London and it was moving from the west to the North-East.
Constant speed and altitude.
I ran to my room to change the lens on my camera for 300mm zoom and took 4 pictures of this object.
Looking through the viewfinder I've seen the ball covered by some orange-red sparkling bright light.
To those suggesting me that was Chinese lantern i can say NO IT WASN'T, and it wasn't a plane.
Crop from bigger picture below.:
Best wishes.