Red Bull Racing and Ferrari have tweaked their testing plans for the final pre-season test of the season next week in Barcelona.

While the remainder of the teams are set to start work again on Thursday for a further four days of running, Red Bull and Ferrari will instead wait until Friday before they get their programmes underway.

As a result, the two teams will then remain at Catalunya into the following week before concluding their running on Monday 5 March, while everyone else brings their pre-season tests to a an end on Sunday.

The only other change to the proposed testing programme is likely to come from Lotus, who are set to take part in a day of private running after problems with the second E20 chassis forced it to pull out of this week's test after just seven laps on Tuesday.