The body said that without “urgent and large-scale action” on addressing climate change, more than 70 per cent of its 500 historic properties will be at medium or high risk of climate-related hazards by 2060.

It launched a Climate Change Hazard Map in 2021 to improve understanding of risks such as flooding and coastal erosion for its properties. New layers have now been added to the map that allow regional teams to flag localised threats posed by climate change.

In the report, A climate for change: adaptation and the National Trust, the body says it faces various short-term risks including flooding, wildfires, drought and coastal erosion. In the long term, it also wants to plan for extreme weather events that will threaten wildlife habitats and increase humidity, which will make it more difficult to care for artworks and collections.

The report also anticipates that changes to visiting patterns – due to hotter weather, for example – could mean that more...