Former British Prime Minister Margaret Thatcher was admitted to a hospital Tuesday evening after a recent spell of the flu, officials said, according to CNN.

"We understand from Lady Thatcher`s office that she`s been admitted to hospital for precautionary tests following her recent bout of flu," said a Downing Street spokesman. "The prime minister (David Cameron) wishes Lady Thatcher a speedy recovery."

Thatcher missed a reception last week held to mark her 85th birthday because she had the flu.

Thatcher, who was prime minister between 1979 and 1990, is known as the "Iron Lady" for her personal and political toughness.

Gerald Howarth, who was a parliamentary private secretary to Thatcher in the early 1990s, confirmed the hospital visit to CNN and similarly wished the former prime minister a fast recovery.