Blue Peter bosses appear to have rowed back over a nationwide challenge in which children were encouraged to swap meat in meals for veg-based alternatives.

The vegetarian option was part of the ‘supersize’ pledge which groups undertake for the programme's 'Green Badge' challenge.

A spokesperson for the BBC told Agriland: “We are not asking Blue Peter viewers to give up meat. That was made clear both on the show and on our website, which has been updated to reflect that buying seasonal food or local grass-fed meat can also make a difference to climate change.

"There are also other pledge options to choose from to earn a Green badge such as switching off lights or using reusable water bottles.”

However, on the programme children were encouraged to take the ‘Supersize Plants Pledge’, with one of the pledge options to replace two meals a week with what it described as “climate-friendly” meat-free alternatives.

This week, Blue Peter will also feature a segment with Welsh farmers exploring sustainable farming for future generations.

The U-turn comes just a day after Quality Meat Scotland (QMS) chief executive Alan Clarke; Agriculture and Horticulture Development Board (AHDB) chief communications officer Christine Watts; and Hybu Cig Cymru / Meat Promotion Wales (HCC) chief executive Gwyn Howells, wrote to producers.

The letter criticised the programme for sharing concepts that were "incorrect, misleading and based on widely debunked data" and sought a meeting with the BBC's head of children’s programming.

The letter claimed children were told: “Reducing the amount of meat you eat, especially beef and lamb, is known to be even better for the climate than reducing the amount you travel in a car”.

"This unbalanced reporting risks compromising the integrity of the red meat produced in the UK to the consumers of the future," it read.

"As a public service broadcaster, the BBC has a responsibility to provide an impartial argument. This is all the more important when communicating to children Blue Peter also promotes the Carbon Calculator, a simplistic tool that cites global data not representative of the UK’s red meat industry."

The letter went on to highlight some of the initiatives happening on UK farms to improve sustainability, such as:

"The highest volume of CO2 is produced by the fossil fuel industries, with livestock farming contributing just 6% of the UK’s CO2 emissions," the letter added.