Red Bull’s struggles on Sunday at the Belgian Grand Prix emphasised the job Laurent Mekies faces when it comes to turning around performance at Milton Keynes, but Christian Horner ’s replacement as team principal is also up against a significant driver line-up dilemma.

Helmut Marko gave a bizarre and apparently unhelpful pep talk to Red Bull team employees after Christian Horner's sacking, it has been reported. Horner's departure took many in the organisation by surprise when it was announced earlier this month,