Sorry Snoopdog, location is just south of Norwich in Norfolk my patch is right onto countryside so did think about deer especially Muncjac

Have you examined the disturbed soil for footprints? Deer and badgers leave very different size prints so even on freshly dug soil you might be able to detect one or two. But has anybody every heard of deer digging? We have a regular badger visitor and so far it hasn't dug up any taters, so I hope this doesn't give it ideas.