El Reg reports:

Royal Navy bomb disposal experts were called to a house in Paignton, Devon, after a tip-off that 68-year-old Thelma Bonnett was rather ill-advisedly using a live First World War German shell as a doorstop

The Daily Mail informs us:

At any time during all those years, however, it could have exploded.

And local newspaper rag The Herald Express confirms:

it had been used by a pensioner as a doorstop for more than 20 years

I was born in Paignton. She seems to fit the demographics much better than I ever did...