Jenson Button says he wants McLaren-Honda to turn its attention to getting more power from its engine, even if it is at the expense of reliability, following a disappointing Belgian Grand Prix.

Though Honda's much vaunted upgraded power unit ran relatively trouble free over the course of the weekend, it remains down on power compared with its rivals, preventing both Button and Fernando Alonso from mounting a sustained challenge in the race.

Leading Button to label his race as 'embarrassing', the former champion has called on McLaren and Honda to now focus striving for more power, even if it meant more technical issues in the meantime.

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"I'd rather have more effort on power. I think that's the aim we have right now - the aim is power - that's always been the aim. Reliability is second really, because I think we'd like to see ourselves quicker and less reliable - I wouldn't have an issue with that.

"The performance is something difficult to find, reliability is probably a little bit easier. Everyone is working hard, but this is tough this weekend, not only were we slow but I had the problem."