An otter or a mink ?

Whilst walking alongside the river Wharfe at 6AM one grey and muggy morning I encountered this guy coming the other way in search of breakfast. As he was approximately 10 feet from where I had previously seen an otter swimming, and much bigger than a ferret type animal, I assumed it was a "dry" otter. However others seeing some of these images on Instagram disagree.

Consulting articles on the internet (a good one is here), the colour and the face do suggest a mink. However the size of over 3ft in length, and the fact that it appeared to be hunting insects, suggested otter. You can decide.

Hopefully I will get a better picture next time!