Sinkhole appeared outside HMP The Mount in Bovingdon , Hertfordshire . Hole was filled in with concrete and soil only fot it to re-appear days later . It is just yards from prison walls and believed to be 15ft deep and about 6ft wide .
Sinkhole appeared outside HMP The Mount in Bovingdon , Hertfordshire . Hole was filled in with concrete and soil only fot it to re-appear days later . It is just yards from prison walls and believed to be 15ft deep and 6ft wide .