Mako and Giant Trevally.
I heard of someone catching Thresher Sharks off of Shetland on the fly. I had not realized that they gather off of Shetland at certain times of year.
I also believe Short Finned Makos have been spotted in UK waters...so perhaps its not such a far fetched dream
Even rumors of Great Whites attacking seals that are attracted to Salmon Farms off of Voe.
As for the GT, only caught its small ones on lures, but with it being my big 50 this year, perhaps I should book a dream holiday!