The energy world is sometimes prone to debates where two sides of an argument take up entrenched, 'winner takes all' positions. One example of this at the moment is the discussion around electric vehicles: in particular, will the electricity to power those vehicles come out of a battery or a fuel cell (the latter fuelled by hydrogen)? 

It sounded like an excellent question for a relaxed, non-partisan chat; and once again we recorded this for - we hope! - your enjoyment.