Appearances Prince William & Kate Middleton for final preparation Pre-Wedding

In english if there are wedding customs of the royal family. They must be formally dressed and polite and not be conspicuous from the bride and groom (the bride). And the bride and groom must bow before the Queen of England bodies. It also applies to President Obama and other invited participants.
Their marriage was only about 18 days but there is concern from Kate Middleton because he lost weight, so she must always maintain their health.