By Daniel Moxon Mercedes chose not to ally themselves with McLaren against Red Bull amid concerns from Zak Brown over the Formula 1 champions’ relationship with their sister team. Red Bull plan to work much more closely with the soon-to-be-rebranded AlphaTauri team going forward. The Faenza-based squad has enjoyed little success in recent seasons and the project has been seen as an expensive one by new ownership as a result. The plan is for the teams to work as closely as F1 regulations allow in the hope that some of the top team’s success will rub off on their sister outfit. But it has led to…