Nico Rosberg is set to test the Halo during Friday free practice for the Belgian Grand Prix, can reveal, as Mercedes becomes the latest team to trial the device.

Although F1 teams voted before the summer break to delay the introduction of a cockpit head protection system until 2018, they also agreed to continue evaluation of the Halo concept this season.

The FIA wants all teams to trial the system over the remainder of this year to get a better understanding of any potential problems, with Mercedes becoming the latest to confirm its intention to help deliver feedback.

The plan is for the Mercedes version of the Halo to be fitted to Rosberg's car for the start of Friday free practice at Spa-Francorchamps, although it is unclear at this stage how long it will stay on the car for.

One of the big questions about visibility limitations for drivers if the Halo is fitted has been how their view would be impacted at corners where there are big elevation changes – like Eau Rouge.

That is why the FIA was especially keen for at least one team to run the Halo in Belgium this weekend so some proper feedback could be given.

Ferrari and Red Bull have already trialled the Halo system, while it is unclear if other teams will also test the device in Spa.

McLaren has decided to hold fire on running the device just yet, but does intend to test it at a grand prix later this season.


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