Lewis Hamilton has theorised that Red Bull’s recent fall off could be because they are already working on next season’s car, as well as due to the reduced wind-tunnel time.

Speaking after the Singapore Grand Prix, Hamilton said: “I don’t really know why they’re off, pace-wise. But I think it’s great to see that others, like [McLaren and Ferrari] have picked up a huge amount of pace.

“It’s great to see that Ferrari have really stepped it up, and I think it’s a positive. Probably, if you think about it, they haven’t been developing. Obviously, McLaren brought an upgrade here, others are bringing up upgrades.

“They’re working on next year’s car so… they have less wind tunnel time, so they’re probably using some of this year’s for next year’s, they would have definitely migrated before us.”