We've also tried the, me having London hold still while Jp slowly comes up, talking gently trying to pet him. He gets within 3 steps from us, and London will struggle with all he's got to get away from me.
Wow, that sounds like the worse thing that you could do.

My advice is let JP feed him and come along on the walks whenever he can. Cindymom's treat idea sounds really good too. I hope they manage to find a solution soon.