Yourquestion here http://www.themodernantiquarian.com/site/3110/wibdon_broadstone.html#folklore "Do you know where it was supposed to have landed?"...
Could this be it? https://www.pitchup.com/campsites/England/Central/Gloucestershire/Coleford/broadstone-park/
(I haven't been)
Sorry it's taken 7 years to reply!