The story of a rare wild flower had celebrity gardener Alan Titchmarsh steaming along to Didcot Railway Centre last week.

The former presenter of BBC2's Gardeners' World was looking into the history of the Oxford Ragwort flower for his new series, The Nature of Britain. Originally, the wild flower was found at Mount Etna in Sicily, before being brought to the Oxford Botanic Garden.

While it was being taken to London on a train, some seeds blew out of the window and took root along the railway line.

Jeanette Howse of the Didcot Railway Centre said: "We still have some growing at the Railway Centre today. Alan took a break between filming in coach 190, where he explained the story of the Oxford Ragwort to Didcot Railway Centre volunteers."