original: Over 6,000 navvies were hired for up to two years building, blasting and clearing rubble beneath the South Downs to create Clayton Tunnel.
simplifications: Over 6,000 workers were hired to make the Clayton Tunnel. They spent up to two years building, blasting, and clearing remains below South Downs. Over 6,000 navvies were hired to help build Clayton Tunnel under the South Downs. For up to two years over 6,000 navvies were hired to demo and remove rubble to create Clayton Tunnel. Over 6,000 navvies were hired. They participated in two years of building, blasting, and clearing rubble to make the Clayton Tunnel. It runs beneath the South Downs. Over 6,000 navvies were hired for up to two years. They built, blasted and cleared rubble beneath the South Downs to create Clayton Tunnel. Over 6,000 navvies were hired for up to two years. They were building, blasting and clearing rubble under South Downs to make Clayton Tunnel. Over 6,000 laborers were hired for up to two years building, blasting and clearing rubble. Their goal was to create the Clayton Tunnel. More than 6,000 navvies were hired to build and remove rubble under the South Downs to build Clayton Tunnel. Over 6,000 navvies worked for two years to clear the rubble under the South Downs, creating the Clayton Tunnel. Over 6,000 ships were hired for up to two years of building, blasting and clearing rubble beneath the South Downs to create the Clayton Tunnel.