Jenson Button's hopes of staying on top of the standings will be boosted by the introduction of an upgrade package for his car at the Spanish Grand Prix.
The Brawn driver has won three of the first four races of the year and starts the European season with 31 points, 12 more than team-mate Rubens Barrichello.
The Brackley-based squad has not introduced significant updates in the first races, but the team confirmed on Monday it will have an upgrade package for the Barcelona race, despite having faced a race against time to be on the grid at the start of the season.
"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," said team boss Ross Brawn.
Button admitted the start of the European season will mark the kick-off of a difficult battle to stay on top, with most of his rivals having big updates for Spain
"I visited the factory last week to join the team for a small celebration of our successes to date and catch up on the progress with our latest developments," said Button.
"We know that we have a real fight on our hands from here to maintain our lead in the championships but I am confident that we are well prepared for the challenges ahead."