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

For TUI flights, Freebird and Albastar airlines:

There are a few reasons why you are unable to book certain seats, please see below for more details;

To help us to avoid splitting groups of passengers travelling together up when choosing your seats you won't be able to:
Book a window and aisle seat that leaves a single middle seat empty
Book a middle seat and an aisle seat leaving the window seat empty

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.

When choosing your seat in Flight extras  you won't be able to chose any seat type including, select your seat or upgraded seats to Premium, Seats with Extra Space and Seats with Extra Legroom unless they have been purchased when booking your holiday or in Manage my booking before entering this site.

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

You will also not able able to select a seat with Extra Space if you are in one of the following categories:
Under the age of 12
Deaf or blind
Travelling with a child on your lap
Mobility impaired – including temporary injuries, like broken bones
Unable to understand cabin crew commands
Using a seat belt extension
Flying with an assistance animal