Interesting differences about timekeeping.
We've plenty of badger sets and 5-6 years ago one family would run past the front of our house, turn the corner and run past our kitchen every night like clockwork at dusk. It even got to the stage where people would come to our house and sit in the lounge to wait for them. "I don't believe you, it's never going to... **** me, there's a badger!"
Then they stopped just like that. They like their routes and keep to them unless something spooks them, when they change their route.
They do dig for worms quite a bit, but unless it's in the middle of your prize lawn, not usually a problem. *
As mentioned by yetidave they've also got unique fur, so look for it that's been caught on a fence or bush... I found a clump at the top of my daughters slide one day. I love to think they were on the slide while we slept...
* Usually. Apart from one night where they absolutely decimated a 20ft * 30ft section, and must have been driving a jcb.