My family have booked Norwegian gatwick to FLL next year. They regularly spend August on the gulf coast of Florida and fly to Tampa (BA)or MIA (Virgin)
Norwegian were incredibly competitive price wise and by booking now for August 2015, managed to get a bulkhead seat both ways for an additional cost. As long as NAS don't go the way of Zoom and Laker, it should be a great alternative to the current Big Boys who are seriously in danger of losing our business.