The children from Ysgol Gynradd Bod Alaw, Colwyn Bay, won a national competition to design a flag that depicts how climate change is affecting Wales. The prize was an overnight trip to Flat Holm Island, 8km off the coast of Cardiff.

Siân Lloyd discussed her views on climate change with the children and said: "I've been presenting the weather for over 15 years now, and the main thing which has struck me is that there isn't a week that goes by without some kind of record being broken. It may be the wettest day, hottest or windiest; but it's proof that our climate is changing.

"No longer can people dismiss climate change; it really is happening, and proof of this is the unpredictability of our weather and rising sea levels that are affecting coastal communities across the world, including here in Wales."

The competition, jointly run by WWF Cymru and the Flat Holm Project, was linked with a series of islands in Fiji, where schoolchildren have also designed posters to illustrate the effects that rising carbon emissions, the main cause of climate change, are having on their communities. Half the population of the Fijian islands live within 60km of the shore. Rising sea levels and extreme weather events are a serious threat to the islands.

"It was great to hear the children present their ideas on how Wales can tackle climate change. They clearly understand how rising carbon emissions from Western countries like Wales, are contributing to climate change," said Morgan Parry, Head of WWF Cymru.

"This project is an example of WWF using its international network to develop links between children in Fiji and Wales to better understand how we are all facing serious environmental challenges regardless of where we live. Most important of all, we are trying to find local solutions to reducing carbon emissions; communicating these with children is essential as they are the future generation."

John Griffiths, Labour AM for Newport East also made a climate change pledge that he would use less electricity and consider more ways he can help the environment.

"I applaud this joint project between WWF Cymru and the Flat Holm team," he said. "It is an example of raising awareness about how the choices we make in our lives contribute towards climate change. The Welsh Assembly Government is committed to developing a framework for delivering a more sustainable Wales."

Flat Holm Island is a Site of Special Scientific Interest and a Local Nature Reserve, which is a haven for wildlife and rare and interesting wild flowers.

The winning design came from Elin Bysouth, a year six pupil from Ysgol Gynradd Bod Alaw, Colwyn Bay. The runners up were Cameron Jones, aged 10, from Lixwm Primary School in Flintshire, and Madison Matthews, also aged 10, from Heol-y-Cyw Primary School in Bridgend.

The winning flag design was unveiled and hoisted by Siân Lloyd and the winner Elin from Ysgol Gynradd Bod Alaw in Colwyn Bay.