In a move that's sure to send worried looks around the F1 paddock, Brawn GP have announced that they will be adding upgrades to their already impressive 2009 model in time for this weekend's race in Spain.
The Brackley-based outfit head both the Constructors' and Drivers' titles heading to the Circuit de Catalunya, and the team are determined to maintain their advantage.
"The short break which we have enjoyed since returning from Bahrain has enabled the whole team to regroup at our factory in Brackley and spend a little time reflecting upon our first four races," said team principal Ross Brawn.
"Jenson, Rubens [Barrichello] and the team delivered a first-class job to win the Bahrain Grand Prix, which is the level of performance that we must sustain if we are to seriously challenge for the Championships this year.
"The field has compressed considerably since the season-opening race in Australia and the performance margins at the front are now very tight indeed," Brawn added.
"Whilst we have been away racing over the past few weeks, the factory has been working extremely hard on our upgrade package for the BGP 001 and we look forward to seeing the results of our development work on track in Barcelona this weekend."
Three-time race winner Jenson Button is confident that the BGP 001 will have what it takes to compete on a testing Barcelona track.
"You need to have a car with good downforce for a really quick lap there and we are fortunate that our car behaves so predictably which enables you to feel completely confident when committing to high-speed corners," said Button.