Cocker progressed from T Cars in 2001 to the Porsche Carrera Cup Great Britain in 2003, finishing fourth in the standings. He also competed in a Porsche Supercup event at Silverstone Circuit in support of the British Grand Prix. In 2004, aged 18, he became the youngest driver to win the British GT Championship. The following year he won the Porsche Carrera Cup Asia.
In 2006, Cocker raced an Aston Martin DBRS9 for Barwell Motorsport in the FIA GT3 European Championship and British GT Championship. In 2007, he shared a bio-ethanol powered car in British GT with United Kingdom Minister Paul Drayson, finishing second. In 2008 the pair graduated to the American Le Mans Series (ALMS) with Drayson Racing, racing an Aston Martin Vantage GT2.
In 2009, Cocker and Drayson made their debuts at the 24 Hours of Le Mans in the Vantage GT2, sharing with Marino Franchitti. They also drove in the 2009 Le Mans Series season. Late in 2009 the team switched to an LMP1 Lola B09/60-Judd, racing at two rounds of the ALMS and in the Asian Le Mans Series, with Cocker taking pole and fastest lap in both races.
In 2010, Cocker and Drayson competed in ALMS with the Lola Judd B09/60 LMP1 bioethanol car. After taking pole, Cocker went from fourth to first in the final four laps of the Road America race to secure their first ALMS victory. Cocker finished third in the ALMS LMP1 championship; Drayson Racing came third in the LMP1 Teams Championship.
In 2012, Cocker joined JMW Motorsport in the Le Mans Endurance Series GTE Pro class, driving a Ferrari 458 Italia. He won the opening round at Circuit Paul Ricard, then took pole and a second victory at Donington Park, clinching the ELMS GTE Pro Championship — his third career title. That year he also competed at the Le Mans 24 Hours for the third time, sharing the JMW 458 with James Walker and Roger Wills. Additionally in 2012, Cocker raced for Dempsey Racing in the ALMS Laguna Seca event in their Lola Coupe LMP2.
In 2013, acting as development driver for Drayson Racing, Cocker clocked 205.941 mph in the Drayson B12 69/EV electric Le Mans prototype, beating the existing flying kilometre record by more than 35 mph. The record-specification car used special low-drag bodywork, a lightweight 20 kWh high-powered battery, and weighed under 1,000 kg to meet the sub-tonne electric land speed record rules. In the standard circuit configuration the car runs two motors per wheel, a 30 kWh battery producing 850 bhp, and weighs 1,095 kg.
Later in July 2013 at the Goodwood Festival of Speed, Cocker drove the B12 69/EV in its high-downforce specification and finished third overall in the final shootout with a best time of 47.34 seconds — just 0.02 seconds behind the second-placed Peugeot 208 T16 — setting a new electric record at Goodwood, more than six seconds faster than the car's previous Goodwood appearance.
This article is based solely on the supplied corpus. No external sources were consulted; claims that could not be substantiated against the corpus were omitted under the drop-the-claim rule.
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