British cannon shell casing?

[Fubuki_Leben]

Hello
I was given this by someone from the royal armoured regiment and i never got the chance to ask what it came from it is definitely a modern type of round (see pictures)

(Pound Coin For scale)

 

[pzgr40]

shellcase for the 27 x 145mm mauser gun for the Panavia Tornado

 

[Fubuki_Leben]

Thanks For that Had it kicking around for a while now