It is my first year of no-dig growing, in North West Wales. Voles have been very active from late summer onward. They don’t seem to eat the roots, but unearth plants by undermining them; they do eat the leaves, and completely destroyed my newly-planted kale plants. I have not seen the creatures, but I presume they are field voles.
We do have owls close by, and buzzards sometimes come into the garden, plus the neighbour’s cat (which is a good “ratter”) but they don’t seem to have had much impact on the vole population. Perhaps their numbers will be reduced in the winter, but I will probably have to resort to trapping them. I have caught grey squirrels with peanut butter on toast, but I don’t know what voles find irresistible.