Furious Fernando Alonso throws his jacket on the ground at the Hungarian Grand Prix - as Aston Martin driver insists an 'unwritten rule' was broken in qualifying

Footage has emerged of an infuriated Fernando Alonso throwing his jacket to the ground during a heated discussion with race officials at the Hungarian Grand Prix.

The Aston Martin driver ultimately lined up in seventh at the Hungaroring on Sunday and was left frustrated after feeling like his efforts had been unfairly hampered during the final stage of qualifying.

Alonso was in the process of completing a flying lap during the closing stages of Q3 when a horror crash involving Yuki Tsunoda saw the red flags brought out.

The controversial decision caused several drivers, including the 42-year-old, to be unable to complete their final lap ahead of Sunday's race.

Following the incident Alonso expressed his disdain for the decision, and a clip shared on social media showed the Spaniard remonstrating with an official after the fact.

In the clip, Alonso throws both his jacket and cap on the ground which were promptly picked up before he was handed his helmet by a member of the Aston Martin team.

The incident proved controversial among fans on social media, with some branding him 'unprofessional' for his actions.

One wrote: 'This is just rude and unacceptable.'

Another added: 'Unprofessional for someone like Alonso.'

A third fan wrote: 'I'd have left it lying on the floor. No way would I pick up clothing flung after a toddler tantrum!'

Following the appearance of the red flag before Alonso and teammate Lance Stroll were incorrectly sent into the 'parc ferme' by officials.

However, there was still enough time to complete another lap, but by that point the rain in Budapest had intensified to such an extent that it was unlikely any driver would be able to improve their effort.

Speaking following the incident Alonso vented his frustration with officials, insisting the FIA made 'gross mistakes' during qualifying.

'The truth is that the FIA ​​sometimes gets it right and sometimes they make gross mistakes,' Alonso told DAZN. 'Today they had made one. 

'It's surprising to me because when there's an accident there, they usually wait until the cars have finished their laps. That's an unwritten rule, at least. 

'I had improved by one and a half tenths by the last corner when the red flag came out.'