The public has been asked not to gather or lay flowers at royal residences, following the death of the Duke of Edinburgh aged 99.
The Government urged people to continue to follow public health advice, particularly on avoiding meeting in large groups and minimising travel, amid continued COVID-19 restrictions.
The Duke died at Windsor Castle on Friday morning.
The Royal Family has asked people to consider making a donation to charity instead of leaving flowers in memory of Prince Philip at the palaces.
"There is no official arrangement for giving donations in memory of the Duke of Edinburgh," the Royal Family website said.
"However members of the public who wish to make a donation as a tribute to His Royal Highness are encouraged to give to a charity of their choosing or one of the charities or organisations which the Duke of Edinburgh supported in his public duties.
"Over the course of his life, The Duke of Edinburgh was patron or president of some 992 organisations, with special interests in scientific and technological research and development, industry, the welfare of young people, conservation and the environment and the encouragement of sport."
An online book of condolence has also been set up and the Royal Family Twitter account said: "During the current public health situation, Books of Condolence will not be available for the public to sign."
The Duke served for more than a decade in the Royal Navy, including in the Second World War when he was mentioned in dispatches.