Hi Bexx
I have been looking into this in great detail lately. Your best bet is to fly with BA or Virgin as they will both supply a seat which is suitable for babies over 6 months. Babys under 6 months seem to fall into a loophole, and there is little protection for them on UK airlines, just a belly belt, and it's even worse on US airlines unless you buy them a seat in which case you can use your infant carrier (if not, you don't even get to use a belly belt, they are completely unprotected - this is the reason that Americans feel so strongly about carseats on aircraft)
For reasons I don't understand infant carseats are banned on UK aircraft - but I digress as your baby will be over 6 months.
My experience with UK Charter airlines is that they don't know the first thing about carseats on aircraft, and everyone you speak to will give you a different answer. I asked repeatedly what sort of carseat I could use on an airtours flight, and was told it had to be less than 15 in wide, forward facing and with a full harness (no booster style seats), consquently we took our Klippan seat since it fit all the requirements, but at the airport the ground staff refused us to use it because it wasn't a Britax - they didn't seem to comprehend that Britax made lots of models and simply being a Britax wouldn't necessarily mean it would fit, they were just fixated on the Britax name. They put the carseat in the hold and we didn't use it.
Bizarrely, on the way back, the ground crew in the States who are familiar with carseats recommended that we use it (the very same carseat) and it fit fine, but Katie wasn't too impressed about being expected to sit in it, when she knew fine well she hadn't had to use it on the outward journey.
We have taken our own carseat all over the place, and have always used it in hire cars, I'd much rather use mine than one provided by a hire company that could be in any state.
Between BA and Virgin, I think Virgin is slightly better - my research seems to show that on Virgin you have to pay for a seat, but the baby gets a proper 5 point harness that is attached to a seat and they can sit in it for take off and landing.
on BA, you don't have to pay for a seat, but the infant seat is on a shelf at the bulkhead, and it can't be used for takeoff and landing, only for the flight itself. I am not sure what happens during turbulence, but I suspect the baby has to move back onto your knee and be strapped into the belly belt.
if you pay for a seat on BA, you can use your own carseat though.
I have scoured the CAA website, and it jsut says that 5 or 6 car seats are approved for airline use, but nowhere can I find a list of models. In the USA approved carseats have an FAA sticker, I wish they would do that here!
Sorry for the lengthy post, but this is a real pet peeve of mine, it's quite an important issue, and it's impossible to get any decent information on the topic.
oh, and flying with a toddler - katie has always been great, she went to New York at 11 months and was fine, then shorter flights between then and 3, and at 3 1/2 and 4 1/2 we went to Orlando and she has never been a problem = she seems to find the whole experience quite interesting and we take loads of things to pass the time (I aim for 1 per hour which seems to work out about right)
bev