RSPB forestry officer Nick Phillips said UK woodlands were already in trouble. “The important point to remember here is that woodland wildlife is already in crisis,” he told BBC News.

“One in six woodland flowers is threatened with extinction. Our woodland butterflies have halved since the 1990s. Many of our woodland birds have declined by 70% or more. This is not the result of tree disease, this is something that has already been going on for some time.”

“Our woodland wildlife is already stressed and we don’t know yet what effect additional stress will have on it.”