Using infant child seat on a flight

Has anyone had any experience of booking an Easyjet flight seat for a 7month old infant and using their car seat. Appreciate will only be used during the flight and not during take off or landing.
Have checked the Easyjet website which states:
"The car seat must be:
able to fit in the 42cm space between the arm rests on the aircraft seats upright and forward facing (rear-facing car seats cannot be accepted as only very few of these types of car seat are ‘approved for aircraft use’ in Europe). "
Also called customer service who just repeat the above.
Have seen Maxi Cosi do 2 seats which are airline approved, but both of these are rear facing and the bucket style seat, so dont meet the above criteria, they even have instructions on how to fit to an airline seat. although a 7month old should only be in the type of seat though.
Any one done this? Recommend any car seats that can be used? Any information would be appreciated
Have checked the Easyjet website which states:
"The car seat must be:
able to fit in the 42cm space between the arm rests on the aircraft seats upright and forward facing (rear-facing car seats cannot be accepted as only very few of these types of car seat are ‘approved for aircraft use’ in Europe). "
Also called customer service who just repeat the above.
Have seen Maxi Cosi do 2 seats which are airline approved, but both of these are rear facing and the bucket style seat, so dont meet the above criteria, they even have instructions on how to fit to an airline seat. although a 7month old should only be in the type of seat though.
Any one done this? Recommend any car seats that can be used? Any information would be appreciated