Jaguar Racing was due to be running in Barcelona this week, but chose instead to opt for straight line testing at the French Lurcy-Levis track. "We decided to postpone our planned Barcelona test this week in an effort to better understand the problem we are experiencing on the front wing section of the Jaguar R3," said a team spokesperson. "Instead, we are conducting a straight-line programme with last year's R2 and this year's R3."