While Princess Beatrice and Mr Mapelli Mozzi are "very much looking forward to getting married" they understand about the important of not undertaking any "uneccesary risks," a Buckingham Palace spokesman said.
"In line with government advice for the UK and beyond, the couple are reviewing their arrangements for 29th May," they added.
"They are particularly conscious of government advice in relation to both the wellbeing of older family members and large gatherings of people. Therefore, the planned reception in the Buckingham Palace Gardens will not take place.
"The couple will carefully consider government advice before deciding whether a private marriage might take place amongst a small group of family and friends."
I'm very sorry for them, especially as they've already had to postpone, but a lot of other people are in the same boat. Wishing them all the best.