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Red Bull became the second Formula 1 team to test the halo cockpit device at Silverstone on Tuesday, but it plans to vote against its introduction for 2017.

Ferrari first ran the halo in pre-season testing, with an updated version known as 'halo 2' used by Sebastian Vettel at the start of practice ahead of the British Grand Prix last Friday.

Following a single out-in lap, Vettel raised visibility concerns and suggested there remained work to be done on the titanium-made device.

Horner's team built an alternative in the aeroscreen, only for it to struggle in FIA crash tests.

That has resulted in the halo becoming the governing body's favoured choice for introduction next year, although Horner has again voiced his concerns over the system.

"It's an inelegant solution to the problem it is trying to deal with," said Horner, when asked about the halo following Sunday's British Grand Prix.

"I would prefer there to be more research time taken to do the job properly rather than rushing something through that may have other consequences.

"I'm not a big fan of the halo and the limitations that it has.

"I certainly wouldn't vote in favour at the moment."

Although the FIA is determined to see the halo on all cars in 2017, it still has to be voted through by the teams at Strategy Group and F1 Commission levels given its introduction requires a change to the regulations for next season.

If there is a block, there remains a possibility the FIA could force it through on the grounds of safety.