The Queen also visited a Yew tree she planted in the gardens four years ago
Visitors to a Hampshire attraction could hardly believe their eyes when they were joined by the Queen.
Her Majesty made the secret visit to Exbury Gardens in the New Forest, to name a mini-steam locomotive in a private ceremony at the weekend.
Dressed in a grey raincoat, she went for a trip around the grounds on the new engine called Mariloo before enjoying tea and lunch.
The Queen is a personal friend of the Rothschild family who own Exbury.
In a statement Exbury Gardens said: "Exbury's new steam locomotive received the best possible launch when a surprise visit from Her Majesty Queen Elizabeth II saw her named and rolled out onto the tracks.
"The Queen, a personal friend of the Rothschild family who own Exbury, unveiled the five tonne Mariloo in a private ceremony on Saturday afternoon just a day before its public launch.
"Her Majesty enjoyed tea and lunch with the Rothschilds and took a walk around Exbury accompanied by head gardener John Anderson who showed her the progress made by a Yew tree she planted four years ago."