Video: Leading F1 engineers discuss diffuser changes for Silverstone and F1 secrecy

Three of F1's leading engineers, McLaren's Paddy Lowe, Renault's James Allison and Red Bull's Paul Monaghan met face to face with 300 F1 fans at the Fans Forum UK hosted at McLaren technology centre.

The fans made it clear that to them F1 should remain the pinnacle of technology despite cost restrictions and asked the experts what changes they all were making to their exhaust blown diffusers for Silverstone to fit in with the new interpretation of the rules.

There was also some amusing banter about secrecy and Red Bull's practice of getting mechanics to block the rear of the car from view.

"Although it’s in some ways amusing what Paul’s guys do behind their cars, the reality is that James and I know exactly what’s going on behind that because we have photographs from other occasions – something we all do – and I quite enjoy sending the odd photo to Paul after a race of his floor! " said Paddy Lowe.

"What’s fantastic about the fanbase of F1 is that it’s generally a very technical audience. That sets you apart from the football fan let’s say. You understand, and you want to understand, technology and we want to keep feeding that."