The National Gallery in Trafalgar Square has a famous painting (called the Wilton Panel) of Richard II kneeling in front of the Virgin and Child (obviously this image belongs to the National Gallery and if they object I’ll have to take it down). All the angels are wearing white hart badges. One of them is holding the flag of St George as the Virgin Mary used to be England’s special protector (this was before the Reformation – not sure what she thinks of us now).