 It was designed by Ross Brawn and John Piper, and was built by Tom Walkinshaw Racing (TWR).In the past, TWR's Jaguars had been designed under the direction of Tony Southgate, while Brawn worked with a large design staff (12 according to John Piper); a paradigm shift (albeit small) in its own right and reflective of Brawn's Formula One background.The abandonment of the Group C fuel consumption regulations meant a change in aerodynamic design philosophy.