Oddly enough I heard from another contact today that "4 Common Edge" was the euphemistic street address of the workhouse created to disguise its function. I don't know if that was standard practice for workhouses.
My ancestor died at 4 Common Edge in 1943 according to his death certificate (though his home address is given as Shrewsbury) by which time the workhouse as an institution if not a building had gone, having been replaced in about 1930 by a public assistance institution known at some point, presumably after 1943, as Quarry House.
Why the son of an old wealthy aristocratic family should have ended up destitute is a mystery.
Many thanks, Chris.