Bright thing

D spotted a small drone flying over the neighbourhood this afternoon - I wasn't quick enough to get to the window with the camera. But as I stood staring out of the window wondering if it would return I took this, of what I thought was an empty sky - but found that there was an odd bright thing , just to the left of the right hand chimney stack. It was on two successive images, so isn't a blob on the lens. Thought it might be the drone, but Dave says that that was black!