Red Bull boss Christian Horner says a final decision on its future engine supplier will be made at the end of June at the Austrian Grand Prix as it weighs up its options between Renault and Honda. In what could prove to be a vital decision which may impact its future driver line-up, Horner says Red Bull will use the next two races in Canada and France to assess the latest updates from both engine manufacturers to finalise its choice of power unit partner for next year. Red Bull has held extensive talks with Honda chiefs and is thought to be receiving engine data from sister squad Toro Rosso who made the switch to the Japanese manufacturer at the start of this season. Similarly, Red Bull...
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