9) Why can't I choose certain seats on the seat map?

TUI flights and for the following airlines: 
Air Europa, Albastar, ASL Airlines France, ASL Airlines Ireland, Evelop Airlines, Germania, Norwegian, Travel Service, Volotea. 

When choosing your seats, you won't be able to book a middle and aisle seat that leaves a single middle seat empty. You also won't be able to book a middle seat and an aisle seat leaving the window seat empty. This helps us to avoid splitting up groups of passengers travelling together, wherever we can.   

If you're travelling with a little one under two, only certain seats are available to you because of where the double oxygen masks are located. These seats are marked on the plan with an 'i'.  

Upgraded seats - Premium, Seats with Extra Space and Seats with extra legroom - will be unavailable unless you've purchased them. 

We also hold some seats on each flight for customers with medical conditions or disabilities.