Hello Martdog,
lost all of my dozen perfect, beautiful, egg layers to a fox about 6 weeks ago. 7 bodies left, 3 headless, pen like a burst feather mattress, heartbreaking. I just hate bloody foxes, they kill for no reason at all that I can see.
I cried and cried, they were my pets and much loved, and also nearly gave up, but decided later on the same day to start again.
I, too, am a pensioner.
I paid £52 for 4 Warren replacements, and £86 for 6 other carefully chosen hybrids, who are growing beautifully, and turning out to be lovely friendly girls. The most expensive of these was a Columbine which replaced my Cream Legbar.
I think you can probably source cheaper hens, with a little research.
My son again made my pen as foxproof as possible, and I just hope it is.
Foxes do not like chicken wire, I think it traps their feet, so he has put down very rough bits of it under earth which could be an entry point.
Foxes can scale hugely high walls and gates, solid as they may be, but they do not like chicken wire at all!
He has tried entry again, but was defeated by hidden wooden boards as he tried to tunnel under.
I really do feel for you, do start again.