Thanks everyone, what lovely comments!!
I've been sitting with her for half an hour or so at a time in the yard whilst she eats in the sun and I read my book! She's still very jumpy and even jumps when I turn a page but she is getting noticeably better now.
She won't touch apples, carrots, ready grass, cool mix, alfalfa, pears or any kind of mash ... I'm hoping that will change soon, so that I can get some wormer into her. She's eating tons of hay! Last night she got through 2 big slabs of hay, a big handful of haylage (trying to introduce it very clowly in case it's too rich for her) and a bucket of grass which my other half picked for her! Grass is the way, and ... drum roll please ... she took some out of my hand yesterday!!!
This morning she took some out of my hand when I went into her stable to let her out too!
She's a messy little madam now that her tummy has settled a bit and is obviously having great fun rolling about in her stable. She has found all of the best places to itch in the yard and there's hair EVERYWHERE! ... will have fun disinfecting all of that when she eventually goes out!
The onyl problem is that I can't stop calling her Faith!!