Her article in thepeerage is here.
From bbc.co; image enlarged by half by gogm.
Lady Leicester wears a luxurious British casual dress indoors under a fur-trimmed coat with long flared sleeves.
Keywords: Cotes, Catherine Fleming, Lady Leicester, Fleming family, Leicester family, British, high straight coiffure, cap, strap, chemise, modesty piece, criss-cross bodice, vee neckline, long tapered sleeves, cuffs, waist band, natural waistline, close skirt, coat, fur, elbow length flared sleeves