The A-Z of the 2011 season

Australia started the season and was a sign of what was to come with a dominant display from Sebastian Vettel

Bahrain had their race cancelled after months of violence in the region. The situation dragged on for months before the organisers eventually accepted defeat

Canada held the longest Grand Prix in history with the wet weather leading to a race that lasted 4 hours, 4 minutes, 39.537 seconds for race winner Jenson Button

Drag reduction system became a big talking point as it split opinion over whether it was great for entertainment value or too artificial for the sport

Engine reliability was good in the field this season with only Williams needing to resort to a 9th engine

Ferrari had a tough season by their high standards, their one moment of celebration came at Silverstone where Fernando Alonso took a classy victory

Grand Chelem - Win, fastest lap, led every lap and pole position - was achieved by Sebastian Vettel for the first time in his career in India

Horror struck F1 before the season even started as Robert Kubica was critically injured in a rallying accident. Whether he will ever return to the sport is still unknown

India became the latest country to host a Grand Prix and did so with great joy and delight as the paddock embraced the New Delhi circuit

Japan witnessed a great battle between Jenson Button, Sebastian Vettel and Fernando Alonso. The McLaren driver took the win but 3rd was enough to crown Vettel world champion again

Kinetic energy recovery systems returned to F1 after first being introduced in 2009 and added an extra dimension to races

Leadership of the races was contested hotly with 15 overtakes taking place on track for the lead of the race in 2011

Mexican Sergio Perez had a fine rookie season, regularly on the pace of his team mate Kamui Kobayashi and only had his season halted briefly after a big crash coming out of the tunnel at Monaco

Nico Rosberg put in some strong qualifying displays and led in Shanghai and Spa but was unable to make it onto the podium as the big 3 teams locked it out from China onwards

Overtaking was at an all time high as DRS and Pirelli tyres created some action packed races. There were 1152 overtakes in the season

Pirelli returned to the sport after a 20 year absence and brought aggressive compounds which seen high tyre wear at many tracks. There were 1111 pitstops this season

Questions linger over the careers of drivers like Rubens Barrichello and Vitantonio Liuzzi after tough seasons at the back end of the grid

Red Bull were simply the team to beat again and were on top form throughout the year. Can they be stopped from a hat-trick of titles in 2012?

Safety car was not something that was seen until the Monaco Grand Prix but was deployed 13 times in the season including a record 6 times in Montreal

Times were extremely tight in the ultra competitive Q2 segment of qualifying, in New Delhi Jaime Alguersuari and Vitaly Petrov both set the exact same time but only the Toro Rosso driver progressed

Unusual to see in the 21st century is red flags at races but we had consecutive races with stoppages in Monaco and Canada

Vitaly Petrov started the season with a sensational podium in Melbourne but the rest of the season was a mixture of good and bad results

Wings came under scrutiny again as Renault's rear wing and Ferrari's front wing were seen shaking violently during the year.

Xerotic conditions greeted the drives in Abu Dhabi and Lewis Hamilton gave himself something to smile about in a tough season with a flawless win

Yeongam was the scene of the constructors championship being clinched but already doubts are surfacing over the future of the circuit which only opened last year

Zzzzz Valencia was a bore but at least the rest of the season produced much excitement!