Recorded in SW England in some woodland outside of my hometown quite late at night. Couldn't get a single match on any bird ID services. Not very knowledgeable about identifying bird calls so if anyone has any suggestions or knows what bird this is please let me know, very interested to find out.
Play this audio clip
It’s a Fox.
I thought it might be but the contact call that sounds similar is much more grunty and lower. The "wow" sound here is higher and more shrill / airy. I was sat in the same place for a good few hours and didn't hear barking or chatter either. It could maybe be a juvenile? although I can't find a good recording that matches very well anywhere.
Mr B is right. It is a vixen calling.
Wow! I had no idea their calls could get so high, I live in an area with lots of foxes but hadn't heard anything like that. I was convinced it was a bird!