Adapting the chassis to take the device, which will be introduced for the first time this season, has proven to be difficult.

Speaking in a video released by the Mercedes F1 team, Allison said adopting the halo had been "a significant challenge" for his outfit.

"This is not a light piece of work, it is several kilograms of titanium that needs to be put in the car," he said. "There are changes that we needed to do to accommodate it to ensure the overall car would still stay below the weight limit.

"It's also not light because it takes really high loads. We had to strengthen the design of the chassis so it would be able to take roughly the weight of a London double decker bus sitting on top of the halo.

"We needed to make sure it would be strong enough to withstand the type of event it w

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