Valtteri Bottas believes Williams will be in a position to challenge at the front of the field again in 2015 as a result of its strong year this season.

Bottas is fifth in the drivers' championship after three consecutive podium finishes in Austria, Silverstone and Germany, while Williams - fourth in the constructors' - is also the only team to beat Mercedes to pole position so far this year. When it was put to Bottas that the stability in regulations should help Williams remain competitive at the front of the grid, he replied: "I think so.

"It's good for us because we know that the base car is good. It's been good to build from that and just keep getting it better and better. Next year is not that different - maybe the noses are going to be a bit different but it shouldn't be the key - so we are confident that we can keep this curve in the right direction."

And reflecting on Williams' strong rate of development this season, Bottas said the success of new parts bodes well for the future.

"I think the difference is last year we kept bringing many more parts than this season, but the difference is this season all the parts we have brought have worked. The correlation between the wind tunnel and the track has been much better. There has been some more changes made how the factory works with the wind tunnel and fine-tuning all these things.

"It's really working and we've also been more selective with all the parts and maybe the team has looked at the bigger picture of the car and which areas to focus on and really focus on something rather than just on bits here and there and keep bringing them."