Hybrid Scottish Wild Cat?

[Gronnuck]

Opinions please. Seen about the garden and the local area recently. IMO its a female since her nocternal wailing is unsettling our Ginger tom. She's twice his size with well defined makings and tawny brown makings under her chin and on her underside. Her tail is longer and thicker than any cat I've ever seen before. Her black dorsal marking runs all the way to the tip of her tail thus the tail rings are joined on her tail's upper side.

I have another photo at http://www.new2youtoyshop.com/wildlife/Cat2.jpg