Cook began competing in the World Rally Championship (WRC) in the production class in 2012 and drove a Ford Fiesta ST. One day before the deadline for production entries, her team had not decided on whether they wished to enter but chose to file an entry shortly before it was closed. At the season-opening Monte Carlo Rally, Cook became the first woman to claim a production class podium position by finishing in second place. Her next rally five months later in Greece saw her secure a sixth place production class result despite her car becoming damaged. Cook's funding had dried up before Rally New Zealand and was forced to sell her trophies on eBay to raise £17,000 which enabled her continuation in the championship.