The great fighting Mackerel are generally considered by the rod and line angler to be a spring, summer, and autumn fish however; in Cornwall, they can be caught in the winter. The average size of the winter Mackerel tend to be bigger than in the summer and are great eating full of tasty omega 3 fatty acids.
Below is video about targeting winter Mackerel by vertical jigging in deep water.
Below is video about targeting winter Mackerel by vertical jigging in deep water.