Vettel fastest in second practice
Hamilton struggling in cool, windy conditions, Button out
Many cars lost control under braking
Get involved & vote: when was F1's best era? #bbcf1
Ferrari boss nearly run over by Massa in FP1
Your reminders for the Eighties are as follows...
The 1980 Ensign driven here by Clay Regazzoni...
Image source, Getty ImagesThrough to 1989 and an image as iconic as they come: Ayrton Senna's yellow helmet at the wheel of a McLaren.
Image source, Getty ImagesSebastian Vettel, currently top of the order, is informed of a gearbox problem over the team radio and is told to return to the pits.
"Anything I can do on the track?" the four-time champion asks.
"Negative, just slow down and box," comes the reply.
That is his second issue of the day having stopped with a similar issue just four laps into FP1.
Image source, F1
Jennie Gow
BBC Radio 5 live pit-lane reporter
More problems for Jenson Button and Honda...
Image source, Jennie Gow1 Sebastian Vettel (Ferrari) 1:09.600
2 Nico Rosberg (Mercedes) +0.011s
3 Kimi Raikkonen (Ferrari) +0.260s
4 Pastor Maldonado (Lotus) +0.314s
5 Lewis Hamilton (Mercedes) +0.537s
6 Nico Hulkenberg (Force India) +0.667s
Into the 1970s we go, which began with cars sporting rear- and front-wing elements of a style that would become commonplace as the decade wore on. Here's Jochen Rindt, world champion in 1970, at the wheel of his Lotus.
Image source, Getty ImagesBy 1979, ground-effect aerodynamics were all the rage, as demonstrated here by Gilles Villeneuve in his Ferrari at the Spanish Grand Prix.
Image source, Getty ImagesTeam: "Headwind into Turn eight has changed direction."
Richard Geary: 1960s racing meant RACING. Drivers were racing in F1, F2, Saloon & sports cars at the same meeting. Magic Days.
Terry C: 1967 - No ads, 4-wheel drifts, no aero, nose-to tail, late braking, overtaking, suspension, tyres last. Just like real cars.
Barry Dunne: Has to be the '80s and early '90s. More teams, more drivers, more drama, less predictable.
Image source, Getty ImagesJenson Button has pulled into the pits, reporting a loss of power in the Honda engine. He's out the car and his session looks done after 17 laps.
The Briton is down in 18th at present, ahead of only the Manors, and is 2.3secs off the pace.
Team-mate Fernando Alonso is four tenths better off in 16th in the McLaren sporting the new nose cone.
Image source, Getty ImagesCarlos Sainz has done a rare thing today. He's gone off track and actually found some gravel to bounce through.
Who left that there?
The Spaniard was bouncing through the kitty litter and on course for a tap into the barriers, but an escape road came to his aid at the last minute, his car gripping to the asphalt and turning sharply away from the tyre barrier.
Image source, F1This session is proving very much that Mercedes have a big fight on their hands this weekend.
Lewis Hamilton is all at sea - he just cannot get the car nailed down through the corners.
Team-mate Nico Rosberg looks better, but he is still being run close by the Ferraris of Kimi Raikkonen and Sebastian Vettel, who is currently fastest on a 1:09.600.
Meanwhile, Lotus look good, as they did in Canada, and currently have Pastor Maldonado in fourth on a 1:09.9.
Image source, APMercedes on Twitter:, external Another wobble from Lewis: this time at T9. Not quite hooking it up yet but there's still time...
Nico Rosberg has gone top with a 1:09.611, a quarter of a second up on Kimi Raikkonen, both set on the super-soft tyre.
Lewis Hamilton, meanwhile, has had a run of very scruffy laps since switching to the supersoft.
He's twice lost it through the final turn and also into turn one.
Very, very ragged from the championship leader.
Sauber on Twitter:, external Off we go again. First run on supersoft tyres for Marcus, Felipe following soon.
Image source, SauberRichey Clarke: The last turbo era. Over 1100bhp, H pattern G box. Minimal downforce. How they kept them on the circuit I'll never know.
Russ Hawker: Has to be the 1980s. Prost, Senna, Piquet, Mansell, Lauda, Rosberg.
Martijn vd Graaf: No doubt, the Prost/Senna battles where legendary. And not only on the track. F1's greatest drivers.
Image source, Getty ImagesRight, this should be telling. Let's see where Mercedes come out relative to Ferrari when they post a lap on the quicker rubber.
Manor on Twitter:, external Red rubber boots up next for Will.
Image source, Manor F1P1 goes to Ferrari's Kimi Raikkonen, who sets a 1:09.860 on his first run on the Pirelli supersofts.
The Finn is the first man on to the red-walled rubber and it seems him go 0.277 quicker than Hamilton.
On his latest attempt, Raikkonen got it badly wrong through the final two turns, running up onto the kerbs and off the circuit. He continues on his way.
Image source, Getty ImagesAlonso does a 1:11.5 in his McLaren, which is sporting a revised nose section. That lap briefly put him in the top 10 but he's back down to 13th now - 1.6secs off the pace.
Carlos Sainz: I don't know what happened at turn one, as soon as I hit the brakes I locked the tyre. The tyres are really weird."
Sainz has gone off twice at turn one inside the first half-hour of this session.
Into the 1960s and cars are now becoming smaller, lower and lighter beasts, as demonstrated here by the Lotus of Innes Ireland at the 1960 British Grand Prix.
Image source, Getty ImagesBy 1969 the benefits of aerodynamic downforce were being explored by designers, resulting in some wonderfully wild designs, as demonstrated here by Graham Hill's Lotus.
Image source, Getty Images