Lewis Hamilton says he feels ready to go for the start of the 2015 Formula 1 World Championship despite technical issues consigning him to the pit-lane as the final pre-season test got underway in Spain.

The defending champion started his day in ominously good form as he pumped in an early 1min 24.881secs time on medium tyres and was poised to go faster had he not been forced to stop before lunchtime as technical issues set in.

Diagnosed as an MGU-K failure, Hamilton failed to make it back out in the afternoon, limiting him to just 48 laps in total, but the British driver was philosophical about the lost mileage, insisting he would rather the problems surface now and not during a race weekend.

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"We got a few laps but we would have liked a few more, but sometimes you have these days. I don't really see it as being too much of a negative. It is good you find these things now and not at the first race, but naturally the more you drive, the more you feel comfortable. "

Indeed, Hamilton - who has one more day in the car before heading to Australia for the opening round of the season - says he is ready begin his title defence.

"To be honest though, after the 50 laps I did today, I am ready to go," he continued. "We have one more day to hopefully have a clean day and get 150 laps, do lots of changes and really try and get to a point where I want to put the car for the first race and have that knowledge in the bank."