News that the UK's Queen Elizabeth had tested positive for COVID-19 drew concern and messages of goodwill from many across the UK, with politicians wishing the 95-year-old a swift recovery.

On a wet and windy day, a few sightseers gathered at the gates of Windsor Castle, where the queen was receiving medical treatment for mild coronavirus symptoms. Others went online to express support, and message boards in the London Underground urged the monarch to "take it easy."

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Many said they were troubled by the news after the world's longest-reigning monarch pulled out of several high-profile events and spent a night in hospital last October, igniting fears about her health.

UK Prime Minister Boris Johnson led the official response, saying he was sure he spoke for the nation when he wished the queen a swift recovery and a rapid return to vibrant good health.

Opposition leader Keir Starmer said on behalf of the Labour Party: "Get well soon, Ma'am," while many other politicians simply tweeted "God Save The Queen."

The widespread support for the queen follows her anniversary earlier this month when she quietly marked 70 years on the throne, the first sovereign of the United Kingdom to do so.

The Palace said the queen was showing mild symptoms and was expected to continue "light duties" over the coming week. In keeping with that, the queen released a statement shortly afterward praising the British women's curling team for their Olympic gold medal in Beijing.

"I know that your local communities and people throughout the United Kingdom will join me in sending our good wishes to you, your coaches, and the friends and family who have supported you in your great success," she said.