Renault are running out of patience with Red Bull with Cyril Abiteboul warning that their offer for a 2019 engine offer may no longer be on the table come the Austrian GP.
Under F1 regulations, all teams had to inform the FIA of their 2019 engine supplier by May 15.
Red Bull delayed their decision as they wanted to see the updates that Renault and Honda brought to the track at the Canadian Grand Prix.
However, even the race has come and go, Red Bull have still not made a call, saying they won’t until the Austrian GP.