Will, younger brother of recent Renault Sport Formula One Team driver Jolyon, had led the standings up to the 12th and 13th rounds of the 23-race calendar at Germany’s Nurburgring in July.
However some rotten luck there was followed by more misfortune at the Red Bull Ring in Austria, Paul Ricard in France and Spa-Francorchamps in Belgium enabled Fenestraz to take over and move clear at the top.
Will remains second overall but it’s now all down to the final three races of the season at Barcelona, Spain at the end of this month (27-29 Oct).
"Looking ahead to the last weekend, the gap is quite large to the leader but you never know what can happen – I will just be focusing on doing the best I can in each of the races in Barcelona,” said 20-year-old Will who races for the R-ace GP team in the single-seater category.
Meanwhile fellow 18-year-old Britons Max Fewtrell (Tech 1 Racing) and Dan Ticktum (Arden) look to be just about safe in sixth and seventh in the standings.
Significantly both have been named as finalists in the running for the prestigious McLaren BRDC Autosport Award – won by Will in 2015.