The Mail centre has a large 24 hour working canteen, which was depositing large amounts of grease into the foul line and which was continually leaking, causing severe flooding and environmental problems.

On carrying out extensive investigation of the existing drainage system, it was decided that the only position (with minimum disruption) to install the Interceptor, was in the landscaped courtyard area next to the kitchen positioned at the centre of the building.

This meant that all plant, materials and soil would have to be positioned by utilising a 100T crane.