Pascal Wehrlein defeated Mitch Evans to win the first race of Formula E's London finale and take the points lead as Nick Cassidy suffered a horrific day that dropped him from first to third in the points. 

Cassidy headed into London as the championship leader with a 12-point gap over his Jaguar team-mate Evans and Porsche driver Wehrlein - the two most realistic challengers of the six who could mathematically stop him. 

But that gap was down to nine points and looked in crisis after qualifying as Evans took the three bonus points for pole, while Cassidy slumped to 17th on the grid and was initially furious with Jaguar's management of his session.