A project to bring back one of the UK's rarest wildflowers has shown its first signs of success, experts said.

The lady's slipper orchid was thought to be extinct by the early 20th Century, until a single plant was discovered in a remote area of the Yorkshire Dales in 1930.

Its location was kept secret, with volunteers providing round-the-clock monitoring over several decades to prevent the plant being dug up and stolen.

A scheme was launched two years ago to plant hand-reared orchids, with a plant discovered last June the first to germinate "of its own accord" since 1930, according to the Yorkshire Wildlife Trust (YWT).

"The lady's slipper is a real icon of limestone habitats," Jonathan Leadley, from YWT, explained.