Further problems halt Renault.

Renault's Formula One team endured another frustrating day of testing in Barcelona, as an unidentified problem restricted Jarno Trulli to less than ten laps.

Although the team conducted important systems development during single-lap runs at the Circuit de Catalunya, a problem with the front end of chassis #04 delayed the progress of the team's planned programme.

"A frustrating day for the whole team," admitted technical director Mike Gascoyne, "A problem at the front of the car, which we didn't manage to fully identify, meant Jarno couldn't complete his programme. The car will be completely rebuilt tonight in order that Jenson [Button] can take over tomorrow."

Button will take over the programme from Trulli today [Friday], as the test moves into a fourth day.