WW1 fuse found in field.

This is the fuse out of the WW1 shell that I found whilst I was out metal detecting in a field in Mark. It is dated 1916 and was shot out of a cannon that took 6 horses to tow. We called the police and they sent out two officers in a van and they had to take me in the van to show them where I dug it up. The sergeant went through the hole and luckily found nothing! When we got back, the police had to send pictures to the army and they deemed it safe and that I could keep it.