Quote Originally Posted by K9soul
I'd recommend this book/pamphlet The Cautious Canine

I'd also use methods found in The Dog Listener by Jan Fennel. I wonder if they have tried having him just completely ignore the dog for a week or so, no looking at, no talking to, no trying to make friends at all. Sometimes for a fearful dog, this helps them relax and come up on their own and they feel safer and less threatened. If he did this for awhile and then she began cautiously approaching to check him out, I'd still have him ignore her and maybe have her (the owner) toss her a treat when she approached, and gradually move that over to him tossing the treat but not looking at her and ignoring her still. Just continue in this way until she seems comfortable in each situation, i.e. glancing at her and then tossing the treat, waiting till she gets closer, eventually holding out the treat without looking at her until she takes it from his hand, and so on.

I have found with Tasha, who is very suspicious and fearful of men other than my husband, that if I can get them to just ignore her she will relax and approach them after awhile, sniffing. If they turn their attention on her she backs away and gets frightened again. I find that the more they try to coo at her and make friends with her, the more upset and frightened she gets. If they hold out a treat she gets even more suspicious and agitated. It could be his attentions are actually making things worse right now.

The above method is what I'd try in that situation. It will take time and patience but I think it has a high chance of succeeding. Good luck and I hope any of these ideas may help!
I have to agree with k9soul on this one. This method actually worked VERY well for Ginger when she first came to live with me. She was terrifed of men and would run and hide and sometimes pee in fright. She actually kocked the broom over on herself once and she saw my husband with it in his hand, because he picked it up, and she figured for sure he had hit her with it. We used the above method of him ignoring her and pretending she wasn't there and now she will hardly leave him alone. I would stop trying to get him to give her treats, she is obviously so afraid of him that it doesn't matter what he's offering, she won't take it and eat it. A fearful dog doesn't care about treats, they care about getting away from what is scaring them. Please give this a try, I don't want to see you have to rehome London and the treats thing, at this stage, really won't make things better at this stage.