McLaren-Honda's preparations for the 2015 Formula 1 season have taken another serious blow after a hydraulic leak and a subsequent engine change forced it to call time on its day.

Despite Fernando Alonso being sidelined, McLaren had nonetheless hoped to make up significant ground during the final test of the pre-season following eight days of persistent technical issues on the new Honda-powered MP4-30.

However, Jenson Button managed just seven laps before returning to the pit-lane with more problems, which have now been traced to a hydraulic failure. As a result, McLaren is being forced to change the engine and will not get out on track again for the remainder of the day.

Related Articles

The problem is just another blow to an already embattled McLaren, which has so far completed just 210 laps over nine days of pre-season testing - many of which have been done at a relative slow pace. As it stands, the team has not enjoyed a single day of trouble-free running.

Former race driver Kevin Magnussen is listed to drive the car tomorrow in place of Alonso, though McLaren could change its plans to prioritise Button's mileage in the car having himself managed just 93 laps so far.