Malaysian GP 2015: Fernando Alonso given 'green light' to return as FIA pass McLaren-Honda driver fit to race following concussion

Alonso missed the Australian Grand Prix after a pre-season testing crash

Fernando Alonso arrives in Sepang alongside Carlos Sainz Jr (Getty Images)

Fernando Alonso and Valterri Bottas will both return to the grid for this weekend's Malaysian Grand Prix after the FIA cleared them to race at the second race of the 2015 season.

Alonso suffered a concussion during a freak pre-season testing crash in Barcelona which saw his McLaren-Honda suddenly veer right and collide with the barrier, before the Spaniard was airlifted to hospital.

However, after the team confirmed that he would travel to Sepang ahead of a final test on Thursday, the FIA have announced this morning that the two-time world champion will be able to take part in this weekend's action, which gets underway with practice tomorrow morning.

Alonso missed the opening race of the season in Australia as McLaren-Honda's reserve driver Kevin Magnussen filled in for the absent Spaniard, only for his car to suffer a mechanical failure on the way to the grid and end the Dane's race before it got started.

His team-mate, Jenson Button, managed to finish the race, but was massively off the pace and was the only driver not to score a point as he finished 11th and last.

Following a considerable amount of speculation over Alonso's future, and numerous tests, he has cleared the final hurdle via an FIA medical inspection in Sepang.

Alonso speaks in the drivers' press conference (Getty Images)

An FIA statement read: "In accordance with normal procedures, McLaren-Honda driver Fernando Alonso was this morning (Thursday) examined by the FIA medical delegate and chief medical officer at the Sepang circuit medical centre.

"During the examination the driver passed all mandatory fitness tests and has thus been declared fit to race in this weekend's Malaysian Grand Prix."

A happy Alonso later tweeted: "Green light to race. Thanks to fia and McLarenF1 for the work, professionalism and help on this last month. £ready."

Williams driver Valtteri Bottas has also been passed fit to drive in Malaysia after undergoing his own medical checks by the FIA.

Bottas was forced to sit out Melbourne after sustaining a back injury during qualifying but following rest and rehabilitation, the Finn has been cleared to race.

A Williams statement read: "Following the injury Valtteri sustained to his lower back during qualifying for the Australian GP, he has been with a leading physiotherapist who has been working with Valtteri and his trainer to make sure he received the best treatment possible ahead of this weekend's race.

"The team has always been fully supportive of Valtteri and his determination to return to the cockpit.

"Following final approval by the FIA medical team in Malaysia today (Thursday), we are pleased to confirm Valtteri will be back in the FW37 this weekend for the Malaysian Grand Prix."

Soon after Bottas tweeted: "Passed the medical tests and I've been given green light from fia to race this weekend! Lets do it! £WeAreRacing £MalaysianGP £77."

Additional reporting by Ian Parkes of PA