Jenson Button feels he has 'unfinished business' with McLaren in F1

Following weeks of speculation over the 2009 world champion's future in F1, it was confirmed earlier this month that Button would stay with McLaren for 2016.

Button had previously said he was "in two minds" about his future, adding there were "miscommunications" with McLaren.

Meanwhile Dennis said he should have told the 35-year-old sooner that he had no intention of exercising the team's option to terminate the deal.

"There's so much that I want to achieve still in Formula 1," said Button.

"As Ron said to me 'we definitely have unfinished business' and we definitely do in Formula 1.

"This year has been such a tough year for the whole team and to see how well everyone has worked together and how everyone has pulled together in such a difficult situation - that also helps you make the decision.

"It makes you realise this team will give everything they can to achieve in the future. I'm very excited about that.

"I have no fear of retiring. I have so many things in life that I want to achieve but it's not the right the time for me to leave Formula 1."

HONDA PROGRESS WILL BE 'BIG'

Honda has struggled in its first season since rejoining McLaren, with poor engine performance and reliability leaving the team in ninth in the constructors' championship, above only Manor.

Immediate progress will be difficult, as while Honda knows the ERS (energy recovery system) is a key area of concern and it has the resources to resolve the problem, it'll have to wait until the winter to do so because of restrictions on development.

Button said: "I don't know how much of a gain we're going to make, you can't put a number on it but I know it's going to be big.

"There are certain things that you can do that can make big difference, for example the deployment.

"We're losing a lot of lap time because we don't deploy as long as other engine manufacturers.

"But also with the car itself, there's so much more that we can extract from it and the ideas that we have so it's looking good for next year.

"Who knows where we're going to be, but it'll be a lot further up than where we are right now."

"Anything is possible over this winter and I know that they're giving it their all to find ways of us having more deployment."