10/7/16 Mercedes' Lewis Hamilton celebrates with fans after winning the race REUTERS/Andrew Boyers.
With five laps to go Rosberg's vehicle was terminal and stuck in seventh gear, but instructions over the pit radio allowed him to fix the problem and continue on for second place.
Rosberg had finished second at Silverstone behind team-mate Lewis Hamilton, and just 1.339s ahead of Red Bull's Max Verstappen.
At the front, Hamilton had no such issues, crossing the line after 52 laps to record his fourth Silverstone victory and third in succession, sending the home crowd into raptures. Carlos Sainz Jr (Toro Rosso) +85.858s 9.
Nico Rosberg has been demoted from second to third in this afternoon's British F1 Grand Prix. A huge thank you first of all to the team for doing such an fantastic job.
He then ran and cavorted in front of them before getting in among the spectators. That's why the British fans are the best and most passionate racing fans in the world, so thank you to them for making it a really great event. "In practice we don't know what fuel loads they were on and if everyone is showing their hand, but definitely today, I was never under threat from either of the guys behind, pace wise", he told reporters including Grand Prix Times.
Nico Rosberg: "What does that mean, I have to shift through it?"
"It was a tricky start in the wet".
Then, after he and German team mate Nico Rosberg collided on the last lap and Hamilton went on to win, the joy had been tempered. All drivers started the race on wet tyres, but quickly moved to intermediates after the sixth lap, while subsequently moving to medium softs for the remainder of the race.
"In those conditions, you don't want to go too early and risk it so it's better to wait an extra lap or so", Hamilton commented.
Hamilton led the field behind the Safety Car for the first five laps until it pulled off into the pits. Perez was 10 seconds adrift in fourth. He lost three seconds and fell back to 11 seconds behind Hamilton.
But Rosberg was made to work significantly harder for second place.
The German, who had a race-long battle with Verstappen, suffered a gearbox malfunction late in the 52-lap race at Silverstone.
Engineer: "Avoid seventh gear, Nico, avoid seventh gear".
Stewards ruled that the advice he received broke regulations introduced to limit the amount of information teams are able to supply to drivers in those circumstances.
"That wasn't planned", said the Mercedes driver as images of him falling back into the sea of people, smiling serenely with his body supported by raised arms, travelled around the world.
Minutes later it was announced that he is under investigation as this season the FIA tightened the regulations on what is permitted to be said over the teams' radios.
They broke a rule saying: "The driver must drive the auto alone and unaided".