McLaren-Honda's disastrous pre-season testing programme failed to abate on the last of the 12 days in Spain as yet more issues limited it to just 30 laps in the hands of Jenson Button.

Save for a single day that yielded 101 laps, McLaren-Honda failed to complete a trouble-free run with the MP4-30 over the three tests and heads for the opening Australian Grand Prix event with just 380 laps (1751km) under its belt.

As a measure of McLaren's troubles, Mercedes managed 1340 laps and 6,121km and Force India only fell a handful of laps short with its VJM08 despite only get two and a half days of track time. It means McLaren managed an average of less than 32 laps per day.

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Indeed, McLaren racing director Eric Boullier is not denying the pre-season period has been very difficult for the team and he anticipates the opening rounds to be equally as tough. However, he remains optimistic for the future.

"Looking back at the last four weeks, our winter test programme has been difficult," he said. "However, that wasn't entirely unexpected: this time last year, we saw many teams in a similar situation when they introduced new power units for the first time. This year, we also had the added complexity that very tight packaging brings.

"In overview, the lack of mileage means we won't be as ready as we'd have liked, but we can take away the positive that all the running and data gathering we've done have confirmed that we're achieving the targets we set ourselves.

"Even if it's likely to be a difficult start to the season, we know we can develop hard and fast, and that we'll surely unlock the huge potential that lies within the McLaren-Honda MP4-30."

McLaren didn't reveal what was wrong with the car on the final day of action, missing almost the entire morning and notching up just 30 laps in the afternoon.