This is the rock that brought Hinchley Wood to a standstill after it was mistaken for a bomb

A 200m exclusion zone was set up around Avondale Avenue on Wednesday as bomb disposal experts investigated an "unexploded ordnance"... that turned out to be a rock

from getsurrey - News http://www.getsurrey.co.uk/news/surrey-news/rock-brought-hinchley-wood-standstill-12087499