The outfit made an impressive start to the season, scoring points with both Sergio Perez and Esteban Ocon in each of the opening four races.

Force India then introduced its first major update package at Barcelona and subsequently achieved its best result with fourth and fifth at Catalunya.

On Sunday, the team strengthened its grip on fourth in the constructors' standings with its seventh double points finish of the year. Perez and Ocon were seventh and eight respectively in Austria to move 49 points clear of Williams in fifth.

For its home race at Silverstone, where team principal Vijay Mallya will make his first appearance at a race in 2017, Force India is planning significant improvements for the VJM10.

"We've got a suite of things coming for Silverstone, including a new front wing," said Green. "There are other bits as well, mainly the front end.

"It's one of our biggest if not the biggest we have done so far this season."

When asked if it was bigger than the Spain upgrade, Green said: "Yes. It'll be incremental from there and then there will be another big update around Singapore time.

"That is just coming through the wind tunnel now, it's going into full-size now."

Green said the team is finding chunks of performance on the new generation of F1 cars "every week" but admitted Force India will soon have to start thinking about allocating development resources to 2018 machine.

"It's going to start to become a challenge when we have to allocate resource to next year's car," he said. "The two cars, this year's and next, are aligned. From a concept perspective, everything we learn on this car transfers straight to next year's car.

"In that respect, we'll keep on bringing parts to the track. They will become less frequent and less complex parts but we will be bringing parts.

"A lot will be looking over our shoulder and seeing how far away fifth place is and whether we can focus more on next year."