Fontsnob, I know what people have been arguing about on the thread thanks. My first post was in response to QueenofDenial who posted a story about men being asked to move for a woman with a baby and a toddler, who had been given seats together, but hadn't been given the sky cot space.
I realise that her story and my response were irrelevent to the OP, but as I have said, this thread is so long, it's no wonder it has gone of on a slight tangent between a very small number of posters.
So although most of the thread has not talked about situations with equal need, the post I responded to did.
I would agree with you that a 2 year old has a greater need to sit next to a parent than a tall person has to get extra leg room. I never said any different. I was talking (in response to someone else) about the extra leg room space, not about parents and infants being separated.
In my opionion, the reason this thread has needed to be as long as it has, is because there are no clear guidelines as to what age a child should be guaranteed to sit next to a parent.
If there were clearer guidelines, then parents would know what to expect. ie, a child of two is guaranteed a seat next to an adult, a child of four isn't. (Or whatever age the CAA decided to implement, I'm just using four as an example) That way, a parent would have a clear choice. They take the chance that their four year old may be sat away from them, or they know they have to pay. If their child is below four, they choose to ignore the offer of priority boarding or pre booked seats, safe in the knowledge that the airline cannot seat then away from their child.
Then anyone who was being asked to move for a parent would know for certain that they were either being asked to move to comply with the law if the child was below a given age, or if they were being asked to move because a parent didn't want to pay so they took their chances with their childs happiness on a plane.
It would then be up to parents to judge if their child of the given age would be ok on their own, or if they knew they wouldn't, then they can choose to pay.