Defence of the realm

Jefferson does his best impression of a 29mm spigot mortar or Blacker Bombard! The concrete cylinder with a stainless steel pin in the centre was constructed to mount this weapon for use in defending the Warburton Toll Bridge over the Manchester Ship Canal in WWII. The surrounding pit in which the three man crew and their store of ammunition would sit, has filled up with detritus over the nearly 70 years since it was abandoned.