Rexbanner - I don't know how much money it will save but by the same token, and with respect, no-one seems to know how many people's view of BA will be coloured by this, either.
I, for example, couldn't care less about the loss of this service; it has no impact on me and it doesn't affect my view of the service I get from BA. I doubt any childless passengers of BA would care (or even know!).
So, we're down to BA passengers who have children. Not all of them will ever need to fly BA with their kids (many will only fly on business, for example) and, of those who do, 98% of the children who fly on BA already fly accompanied by parents or carers so it, presumably, doesn't bother them that much either.
I'm afraid it seems to me that some of the reactions to this news stem from misty eyed memories of being a child being escorted to a Comet and introduced to the Captain before he puts a stamp in your "logbook"...