Bright flame in night sky moving at variable speed and seemed to be controlled and was silentOrange flame seen in night sky. Appeared to be initially a few hundred yards away and travelling approx 50 mph. The flame seemed to be unaffected by the speed of the object (it had no direction to it, it was just a burning flame).It slowed down very quickly over the floodlit Cathedral we were standing by and then rose up to approx 1/2 mile as if to take in the view. It moved about slowly in this position for about 30 seconds before moving off quickly in a North Easterly direction. It appeared to slow down then but this could have been due to the receeding effect. Two males appeared at the site to witness the same object we were watching. The flame now appeared to be dying away as if it was almost extinguished and then would re-ignite. It suddenly disappeared. There was no sound from the object.