I really struggled to find King Alfred's Cakes (I'm in Farnborough, Hampshire) and there just don't seem to be many Ash trees now, let alone fallen branches However, on a recent trip to the New Forest, I (literally) stumbled upon a fallen branch from an Ash which had a good number of them, so I liberated a couple to try with.
Apparently Ash used to be the third most common tree in England, but I can only guess that Ash Dieback has had a much bigger impact than I (and I suspect many others) appreciated.
I used to live near Farnborough in the 60s and 70s. I remember the elm being devastated in the area back then.... including my tree house tree. I remember crying my heart out when that went. Recently saw a stand of conifers all looking very dead. It's a big problem. With the amazon burning and tree diseases decimating them. I worry for the future of our world.