McLaren team principal Martin Whitmarsh has unintentionally revealed the length of Jenson Button's new deal with the Woking-based outfit.

When it was announced in October, it was described merely as 'multi-year' [see separate story - here]. However speaking after Sunday's inaugural Indian Grand Prix at the all-new Buddh International Circuit, when asked about Button's form, Whitmarsh let slip that it is for three-years.

"Let's hope it [Button's form] continues like that as we have another three exciting years with him to go," Whitmarsh said according to reports on SpeedTV.com.

Meanwhile, in the team's official preview release for next weekend's Abu Dhabi Grand Prix, Whitmarsh, promised that there will be no let up from McLaren as the season heads into its final two events.

"The Indian Grand Prix was a unique achievement for F1, and next weekend's race in Abu Dhabi will be another pinnacle for the sport at probably the most futuristic and impressive circuit on the calendar," Whitmarsh said.

"Jenson was quick and incredibly consistent in India, putting us in a position where we could be a little bit adventurous with the tyre strategy and put the leader under greater pressure.

"I know Lewis [Hamilton] was disappointed with the outcome of his own race but that will not affect his preparations for the next challenge. He has an extremely impressive track record in Abu Dhabi, starting from pole position in 2009 and setting the fastest lap on his way to the podium in 2010, so I'm very confident that he'll shine this weekend.

"At Vodafone McLaren Mercedes we approach every grand prix with one aim: to win it. So while we can never be entirely happy with finishing second, as we did in India, we can be satisfied that we maximised the technical package we had and look at ways to go one better for the next race.

"Even though we've secured second place in the constructors' championship, and Jenson has a very healthy margin in second place in the drivers' championship, the season isn't over for us by any means.

"We're continuing to bring new developments to our car and we'll be fighting every bit as hard as we did at the first race in Australia back in March," Whitmarsh summed-up.