A pond-hopping dad sent this in:
Last year, as we took our boys to Finland, we encountered a variation on the typical airline bassiets which was quite useful.Sigh indeed. They look like little busines class seats.
According to the BA staff, our 767s had an additional type of bassinet which was for toddlers. Our twins were then 1 year old, and they slept peacefully the entire way through both transAtlantic flights. If you look carefully, you'll see that these bassinets are shaped more like a La-Z-Boy and are not simply box-shaped, as are most airline bassinets.
I don't know if other airlines or aircraft have these, and they have to be arranged ahead of time. We certainly enjoyed being able to eat, drink and watch a movie rather than spend the entire flight catering to the boys.
The nicest thing about those bassinets was to watch everyone file out at the end of the flight and listen to quite a number of them say that the boys were amazingly quiet for the entire flight. Twin babies must be a daunting sight for a long, nightime flight.
The London-Helsinki flights did not have these (sigh).
update: fellow twindad geoff actually looked it up on ba.com; the bassinets are first-come-first-served, and they're by Britax.]