Spencer-Churchill. Quartered 1&4 Churchill a Canton of St George, 2&3 Despencer a bend sable three scallops, overall an escutcheon St George overall an escutcheon Capet.
Fox. Ermine, on a chevron azure three fox's heads and necks erased or on a canton of the second a fleur-de-lys of the third. The canton is an augmentation of honour to his paternal arms, granted out of the Royal Arms as a mark of esteem to him and his heirs forever, by King Charles II following the Restoration of the Monarchy. Source.