The push for cockpit protection has gathered urgency after the deaths last year of Justin Wilson and Jules Bianchi.
Rio Haryanto's main sponsor is oil company Pertamina, which has contributed five million euros towards the funding needed to secure his seat
James Allison spent three years in his second stint with Ferrari, before he was at Ferrari during Michael Schumacher era of 2000 to 2004.
Nico Rosberg had a 43-point lead after the Spanish Grand Prix but is now six points behind Lewis Hamilton at the halfway point of the season.
Fernando Alonso finished seventh in last week's Hungary Grand Prix and is now preparing for this weekend's German Grand Prix.
Lewis Hamilton seized the lead from Mercedes team mate and title rival Nico Rosberg after an unprecedented fifth victory.
Jolyon Palmer has retired in four of the eleven races so far with a best finish of 11th in the season-opening Australian Grand Prix.
Drivers are required to reduce speed significantly and be prepared to change direction or stop under double waved yellow flags.
Arjun Maini secured ninth position with a best lap of 1:33.874 after the session was red flagged.
Lewis Hamilton, who has now won in Hungary a record five times, leads Nico Rosberg by six points after 11 of the season's 21 races.
In the double header, Armaan Ebrahim and Dilantha Malagamuwa, driving team Dilantha Racing, finished third in the first race on Saturday.
Regulations state any driver who sets a time slower than 107 percent of the fastest lap in the opening part of qualifying cannot take part in the race.
Rules state that a driver must reduce speed significantly and be prepared to change direction or stop in case of 'double waved' yellow flags.
Nico Rosberg had also posted the fastest time in the second practice on Friday.
Lewis Hamilton was fifth fastest after crashing with just four laps on the board.
Lewis Hamilton has bounced back from a difficult start to the season with four wins from the last five races.
Nico Rosberg joined Mercedes from Williams in 2010 and has won 19 grands prix for the team, including five this year.
Nico Rosberg said not even the usual team analysis of last year's race at the Hungaroring would do much good.
The German driver was relegated from second to third, having completed the race, after a radio dialogue with the team.
Hungary also offers misfiring McLaren the chance of a strong result at a circuit that has been good to them in the past.
Red Bull would oppose the introduction of a proposed 'halo' cockpit protection device in Formula One next season
Nico Rosberg has his lead in the driver's championship reduced to just one point after the British Grand Prix.
After starting 11th in wet conditions, Sebastian Vettel was the first driver to switch to slick tyres
Race stewards imposed a 10-second penalty on Nico Rosberg for receiving help from his team via radio transmissions.
The triple Formula One world champion's fourth home win, from pole position, was the 47th victory of Hamilton's career.
Mercedes team boss Toto Wolff has warned of stiff penalties for whoever is to blame for further collisions.
Marcus Ericsson needed to pass the medical after crashing heavily in Saturday's final practice at Silverstone.
Lewis Hamilton is chasing Nico Rosberg by a small margin of 11 points in the season championship race.
Lewis Hamilton delivered, going even faster as he headed for the line. Nico Rosberg could not get near him.
Lewis Hamilton will be chasing his fourth win and third home success in a row to cut Nico Rosberg's championship lead of 11 points.
Lewis Hamilton wound up 0.063 seconds better than Nico Rosberg, who missed the entire second Friday session.
Jenson Button's future at Honda-powered McLaren, who have not won a race since his last victory in 2012, is up in the air beyond this year.
Hamilton and Rosberg have now collided for the second time, following a similar incident on the first lap at the Spanish Grand Prix.
Sebastian Vettel had been leading the race when the tyre exploded on the pit straight on the 27th of the 71 laps.
Lewis Hamilton was jeered after he won in Spielberg last Sunday following a last-lap collision with team mate Nico Rosberg.
Niki Lauda also dismissed Lewis Hamilton’s claims that he had buried the hatchet with teammate Nico Rosberg