To ensure that you can travel with a modicum of comfort, the airlines allow you to choose a seat, usually preferred are aisle or window, first come first served, but at a price.
That leaves those passengers who choose not to spend money on that option. They can soon pay to be sure they do not end up assigned to the middle seat.
(Here at the NetLetter we recommend travel on those flights with 2 x 2 seating, business or first class on long haul flights. We are not sure how the airline will handle refunds when only centre seats remain available!)
If you are a British citizen born on, or before, 2nd September 1929, you are eligible for a free British passport. To call the Passport Advice line from Canada, dial 011-44-300-222-0000.
Dargal Interline have many specials, here a some.
7 Night Alaska ~ Norwegian Cruise Line ~ Norwegian Jewel
12 Night Mediterranean ~ Norwegian Cruise Line ~ Norwegian Spirit
7 Night Hawaii ~ Norwegian Cruise Line ~ Pride of America
Prices are USD