Pilots are calling for research into what would happen if a drone hit an airliner, after 23 near-misses around UK airports in six months last year.

Reports from the UK Airprox Board reveal the incidents happened between 11 April and 4 October 2015.

The BBC's Owain Rich, who is a professional drone pilot for BBC News, has explained the rules involved with drone flight and the importance of sticking to them.

Video journalist: Ed Ram