Natural history programme makers at the BBC will be blocked from working on shows until they have sat through a fakery prevention course, after two shows were found to have broken editorial rules.

On Thursday, the corporation’s governing body, the BBC Trust, said that BBC2’s Patagonia: Earth’s Secret Paradise and BBC1’s Human Planet: Deserts – Life in the Furnace had both been guilty of a serious breach of editorial guidelines.

The Patagonia programme, which aired in September, was considered “potentially misleading” by the trust after producers allowed viewers to think they were looking at a single volcanic eruption. It was in fact a composite image which included lightning flashes from a completely different volcano, some years earlier.

On the Human Planet episode, which aired in 2011, audiences were misled when programme makers used a semi-domesticated animal to fake scenes of herdsmen hunting the canine that had killed an infant camel.

The two breaches come despite the fact that the corporation introduced a training scheme in 2013 aimed at preventing such embarrassing fakery rows on natural history shows. This was introduced following public concern about the transparency of these programmes, after a string of embarrassing revelations about how certain images of the natural world had been produced.

This included Frozen Planet, narrated by David Attenborough, which in 2011 had not made it clear that footage of newborn polar bear cubs had actually been filmed in an animal park. Other shows including 2013’s The Great Bear Stakeout have also come under fire.

It has emerged that the producer of both the Patagonia and Human Planet shows had not completed the corporation’s training course designed to prevent such instances of misleading viewers in natural history shows.

Thursday’s trust report said: “The series producer was aware of the specialist training course that had been developed by editorial policy for NHU staff. While she was aware that it was mandatory training, she had not completed the course because she had either been out of the country filming when it had been run or, when she had been booked onto a course, it had been cancelled.”

As a result of the latest breaches, the corporation’s management said senior editorial staff would “not be allowed to start work on a production unless they had completed the course”. It was added there would be a “formal check” at the initial meeting on each production to make sure the training had been done.

The Natural History Unit would also make sure staff already working on shows had done the course.

Trustees said the breach of guidelines in the Patagonia show was “the regrettable result of individual error of editorial judgement”.