I made the mistake of assuming if you booked for a cot that you would be allocated a cot. BIG MISTAKE
I was told that they are allocated on age of baby, smallest get priority (in my view the smallest are actually easier on your lap!) but anyway, do be aware of this.
I booked almost 12 months in advance and travelled to australia without one.
Two seats with myself, 2 year old and 10 month old.
And we were stuck in the middle of the plane, no extra leg room.
It was not fun, but thank goodness for amazing passengers around us.
AND, the toddler car seat they provide is useless. Does not recline at all. Do they expect a toddler to stay upright the whole trip.
You can tell I will not be travelling with Virgin again!