Why “unusual” McLaren F1 upgrade has piqued Mercedes interest

McLaren produced a shock performance in last weekend’s British Grand Prix as Lando Norris secured a spot on the front row and then emerged as Max Verstappen’s main threat in the race to come home in second. 

But the way he was able to hold off Lewis Hamilton in the closing stages of the race, despite being on slower hard compound tyres, left many rivals impressed about the amount of progress McLaren has made with its car since new parts were added at the Red Bull…