Each year for this past 30 years Mackeral have been available in enough numbers during the last week of May. Not 2013. On a few days there were enough Mackeral caught, but most days are seeing just a handful caught for perhaps 2 hours feathering for them.

My view is that the only possible explanation is that they are simply late this year – no option other than wait & see (and of course buy frozen Mackeral / Done)