Piling rig fuel trial A PILING rig on the HS2 construction site near Euston was powered by hydro-treated vegetable oil (HVO) during a three-week trial aimed at finding more environmentally-friendly fuels for use on construction sites.
HS2 says it is the first time such a trial has been conducted in the UK using a piling rig. The engine is believed to be the biggest used in testing the suitability of HVO.