Britain's Queen Elizabeth II was released from a London hospital Monday after a one-day stay for a stomach bug. A palace spokesman said the Queen's visit was simply "a precautionary measure."  The 86-year-old left King Edward VII Hospital unassisted Monday afternoon with a bright smile wearing a scarlet coat. It was the Queen's first stay at a hospital in a decade, having last spent time in 2003 for for an operation to repair damaged cartilage in her knee.

The queen, who was suffering from symptoms of gastroenteritis, seemed in "good spirits" and was moved to the hospital "simply to enable doctors to better assess her."

Her visit, which was initially planned for two days, was still long enough to force her to postpone or cancel her engagements for next week—which included a two-day trip to Italy. She already skipped one event, a military parade in the Welsh city of Swansea on Friday.

However, according to the AP, the monarch will be back to work next week ready to take on her duties. 

Gastroenteritis is an inflammation of the stomach lining and intestines.  

King Edward VII Hospital is a royal favorite and the same hospital the Queen Elizabeth II's grandaughter-in-law Kate Middleton stayed in December for extreme morning sickness.

Her grandson William has certainly been up and on his feet recently.

The Prince flew in via helicopter to the mountainous north Wales region of Snowdonia last Tuesday to save two stranded men, who were reported missing.

The men, who were in their 40s and 50s, were trekking to the area's Glyder range but were forced to make camp there because they did not have the necessary equipment to make it off the mountain before nightfall, according to British media reports. The area is known for freezing temperatures that can be life-threatening when not adequately prepared for.