It's really kind of you Jon to keep an eye out for these two waifs.
I look at our two stretched out on the sofa toasty warm and smiley, or tucked up into their soft blankets in their bed in the warm kitchen at night, and I worry about strays out in the bitter cold.

I know our Siamese, being a tropical type, need more warmth than British breeds (they only have one layer of fur, and are elongated in shape to lose heat) But even my British cats in the past hugged the log fire (in our last house) or plastered themselves against the radiators in the wintertime.

The feral cat you describe will be quite savvy, as you say. Let's hope the pigsties provide a bit of shelter for him/her.