UFO Sightings Reported Nottingham UK

When I witnessed the UFO I was putting the bins out at  my University house. I decided to look up at the stars as it was a very  clear night and they seemed particularly bright and visible on that  particular night. As I looked up I noticed what at first glance appeared  to be a small gray UFO object traveling across the sky from left to right. As the UFO object  was emitting no light and making no sound I originally assumed that it  was simply a night bird such as an owl flying relatively close to the  ground. However after watching the object curiously for a few seconds it  suddenly and rapidly changed direction and made a sharp left turn,  advancing rapidly. It then made an equally sharp right turn straight  after this and once again accelerated forwards rapidly once the turn was  complete. I knew then that this could not have been a bird as I have  never seen any bird make such rapid turns and accelerate so quickly and  effortlessly in my life. There are planes that often fly over my house  to the local airport however these are easily recognisable as planes due  to their lights and the sound of the engines, the same goes for any  helicopters that fly over. These facts make me firmly believe that this  object was genuinely a UFO Sighting. This was my  immediate reaction when i saw the object make such seemingly impossible  manoeuvres in the sky. I lost sight of the UFO after 25-30 seconds as it simply seemed to disappear.