An allegedly frosty Easter, I should say. Per tradition, members of the British Royal Family convened at Windsor to attend an Easter service with the Queen. As such, the family tends to stay at Windsor Castle, walk to church as a group, line up for the Queen to arrive via car, attend the service, and then depart as a group to walk back to the Castle.
And also per tradition, the family is photographed while they are outside with people tending to enjoy watching them interact while they wait for the Queen.