"I think she was pleased."

"Our key message is that limiting warming to 1.5C would be a major achievement - it should absolutely be our target - but in no sense will it slow or stop sea-level rise and melting ice sheets," said lead author Prof Chris Stokes, a glaciologist at Durham University.The

saw the world's nations agree to keep global temperature rises "well below" 2C - and ideally 1.5C.That has often been oversimplified to mean 1.5C is "safe", something glaciologists have cautioned against for years.The authors of the new paper, published in the journal

, draw together three main strands of evidence to underline this case.First, records of the Earth's distant past suggest significant melting – with sea levels several metres higher than present - during previous similarly warm periods, such as 125,000 years ago.

And the last time there was as much planet-warming carbon dioxide in the atmosphere as today - about 3 million years ago - sea levels were about 10-20m higher.

Second, current observations already show an increasing rate of melting, albeit with variation from year to year..

The strategy comes as Welsh Labour prepares for the next Senedd election in May 2026, withsuggesting the party has a fight on its hands.

Labour has been the largest party in the Senedd at every election since devolution began in 1999, leading every Welsh government that has been formed.It has also been the biggest party in Wales in every Westminster election since 1922.