In our town museum they used to have what I am sure is the pointed end of a 22mm incendiary cannon shell from the war . It was found in the river some years ago . The tip has been dented and the back end of it has corroded or burnt away. I need to get an opinion from an expert as to whether or not it is one but it makes one wonder if it was fired and hit an aircraft during the war . Beaufighter,Spitfire, Hurricane, Mosquito. Not likely to be from a Whirlwind , Typhoon or Tempest .