What sort of bomb/shell is this? Found this in my yard while metal detecting. One side says HETLS… or something and the other 7′ 1/2 x 1′ 1/2 x 1′ 1/4. Could

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oops dig this British ww2 2inch mortar round 💥💣found in Sussex UK : r/ metaldetecting

UK police remove and detonate bomb used as garden ornament