I saw it too Phil and I tried to photograph it, but a strange high pitched electronic sound penetrated my flat and in a desperate need to get my hands over my ears I dropped my trusty camera to the floor. It exploded giblet wise into a million springs, screws and bits of glass...sadly never to function again...stuck forever at 1/60 at f8!
But my eyes still functioned fine and I gazed in awe and wonder at the sight before me. It dithered and hovered over my roof and I swear the driver called out to me...
"Did you see that bloody Alitalia jet..Jeezez that was close!"
With that it flashed away off into the blue and I never saw my friend at the controls again.
