@Richard142 Said
Do people really want explanations? I searched BBC's web site and could only find a reporting from 3 days ago in Northern Ireland. This makes quite a high number of unusual sightings if this frequency is representative. However the 'laws' of physics indicate that nothing can fly faster than the speed of light. If there is no other life able to travel between planets within the solar system and other stars are many light years away then it is impossible for ravel between stars so none of the strange sightings can be visitors from other star systems. Is this a valid logical deduction? It's difficult to prove a negative.
What you suggest Richard, is dependant on whether or not other advanced races in the universe have discovered how to utilise wormholes, if at all they exist?.
Also, we must not discount visitors from parallel universes, if at all they exist?.
I personally believe that many of these UFO sightings can be explained although not all.
Being a keen amateur astronomer, I have often seen satellites glide across the sky. They move faster than aeroplanes and there are many of them.
The many hoaxers do not help the situation as it wastes time and energy for the serious UFO investigators. If there are any serious ones that is.
My feeling is that until I see concrete proof that they are of alien design, I will not side one way or the other. Stay on the fence until sure is my moto.