More changes have been made to the design of Formula 1's new 2021 car, including "drastic" improvements in chassis safety.

Though the new regulations were revealed last October, there is still a small window of time for amendments before the final deadline at the end of this month.

And as the development of the 2021 concept has continued, the World Motor Sport Council confirmed the latest alterations aimed at a number of different areas.

At the front of the car, there have been “changes to the front wing profiles to prevent downwash which would have resulted in a severe compromise to the overall objectives to allow cars to race more closely," the statement read.

Meanwhile, “front wing endplates, top bodywork and rear wing endplates [which] have been modified to give the teams more commercial space.”

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The most notable changes are to the chassis where revised frontal, lateral and rear crash tests are to be introduced with the aim of increasing "strength and energy absorption" in the wake of the F2 accident which killed Anthoine Hubert at Spa-Francorchamps last August.

The rear wing and rear crash structure will also now be tethered to the car in a similar way to the tyres to try and limit debris spread.

To meet those requirements, the minimum weight will increase by seven kilograms to 775kg.

Elsewhere further powers have been given to the Cost Cap Administration to govern the new $175m budget cap coming into effect, with members now able to monitor teams' spending either remotely or on-site at any time.