Lando Norris believes two key calls cost him victory at the British Grand Prix, after losing out to Lewis Hamilton and Max Verstappen in the final laps. The British driver was leading midway through the race when rain hit the track, causing polesitter George Russell and Hamilton to struggle in the greasy conditions. Norris had a comfortable margin as the rain intensified and teams switched to the Intermediate tyre, however, it was only for a short while before the track dried up and caused them to wear. Mercedes chose to pit Hamilton a lap earlier than Norris, going for a set of used soft tyre…