F1 bosses and the FIA are working on plans to adjust the current formula of turbocharged hybrid engines and create a new specification from 2021.

An initial meeting was held in March with F1's current manufacturers, plus representatives from outside the current championship field that included the Volkswagen Group.

A second formal meeting was held on Monday, with Aston Martin, Cosworth, Zytek and Magneti Marelli attending for the first time.

The FIA and commercial rights holder are keen to get a wide range of views on how F1 engine technology should evolve and create a framework that is attractive to current and prospective new manufacturers.

Motorsport.com understands the meeting was largely positive, with the FIA running through the feedback it had received and presenting ideas for moving forward.

There was a widespread acceptance that F1 should remain the pinnacle of motorsport and therefore engine technology could not go backwards.

A source said the next step will involve individual consultation with the participants who attended the meeting.

The FIA and the commercial rights holder will then formulate a joint proposal.

It is hoped the next meeting will take place in September, shortly before the World Motor Sport Council convenes on September 21.