Lewis Hamilton 'yelling in his helmet' during Practice for the British GP

Lewis Hamilton says he was so excited to drive around Silverstone that he was yelling in his helmet during Friday practice for the British GP.

The Mercedes driver topped both of the day's sessions with team-mate and title rival Nico Rosberg unable to set a lap time in the afternoon due to a fault on his car.

"It was incredibly gusty out there, which is one of the awesome challenges of this circuit," Hamilton said.

"Coming through Maggotts and Becketts then down through Stowe, I was actually yelling in my helmet, it was that exciting. Today we just had a bit of a headwind and it just felt epic through there - one of the most fun rollercoaster rides you can imagine."

Almost 150,000 fans are expected to cram in around the circuit on Sunday when Hamilton will be seeking his fourth British GP victory.

British GP Practice Two report

Hamilton's hopes have been boosted by a problem on Rosberg's car which meant the German had to sit out the entirety of Practice Two.

But the world championship leader is confident he can overcome the setback, as he aims to extend his 11-point title lead this weekend.

"A pity not to get out and I definitely lost some track time there," Rosberg told Sky Sports F1. "It makes it a bit more difficult, but I really felt good this morning in the car so I'm not too worried.

Please use Chrome browser for a more accessible video player

"I will try and do the homework. I was listening to what Lewis was doing [over the radio] and watching his data and all that, trying to learn a few bits and pieces that I can take over to my car. I wasn't far off this morning anyway in terms of balance, so it'll be fine."

Asked by Sky F1 what could stop him wining Sunday's race, Rosberg replied: "Lewis Hamilton is the only possibility at the moment."

Meanwhile, Mercedes boss Toto Wolff has all-but confirmed that Rosberg, out of contract at the end of the season, will stay on with the team for 2017 and beyond to again partner Hamilton.

Are Ferrari waiting for Hamilton?

"We are in positive discussions," Wolff said. "I have no doubt…this will be the partnership next year. You can never say 100 per cent because you don't know what will happen tomorrow. But I am very, very confident this will be the line-up."

The Silver Arrows chief later reiterated to Sky Sports News HQ: "We are committed to extending our partnership with Nico."

Mercedes announced on Thursday they would not be issuing team orders to their 'warring' drivers despite their crash in Austria. But speaking to Sky F1, Wolff admitted Mercedes would impose team orders in identical circumstances to those which occurred at the end of the controversial race in Spielberg.

When is the British GP on Sky?

Make sure you don't miss Sunday's Silverstone race!

Watch the British GP live on Sky Sports F1. The race starts at 1pm on Sunday, with build-up underway at 11:30am. Or watch the race without a contract for £6.99 on NOW TV.