>> reporter: 600 guests who have been invited to the wedding reception will gather in the palace's main state rooms, where day will mingle with the newly married couple, who will have come by carriage if westminster abbey. wedding cake will be on display in the long picture gallery alongside some of the palace's art treasures. for the palace officials responsible for organizing the day, it will be a culmination of months of planning. >> there's an awful lot of detail to go into, the planning of all events we do at the palace, which will involve the event planning itself, the invitations, working out the menus, working out all of the details of the drinks. >> reporter: one month to go now to the royal wedding and in the kitchens of buckingham palace, everything, it seems, is ready. nicholas wichell, bbc news. >> such precision. >> hope they have some pigs in a blanket.