The only otter I have seen in the wild was 2 years ago at dusk in the Spring time on the Kingswear side of the Dartmouth Higher Ferry road. He slid down the bank and crossed the road and I followed him for around 100Mtrs before he disappeared into the undergrowth.
A wildlife Vet friend of mine said it could well have been a young male looking for a partner, I'll never forget it a very special few moments.