My friend found this while gardening. Took it in the house before sending me a pic! Ended up getting the police / bomb squad over who confirmed it was live.
Lump of a thing, isn't it. Reading how it was used, I'm not sure I fancy arming that before subjecting it to the force of rifle launching. Though I suppose giving the HG something, especially something relatively modern, was better than sod all. Good to hear it got called in.
Only a couple of inches diameter - same size as a No.36 Mills bomb and fired from the same cup discharger.
Nothing unusual in Essex these days, but spotting a policeman is very unusual. They knocked down the local nick to build more houses. From local news pub. last Wednesday.