In message , Bruce
writes

Just try taking a small child on the Tube with a
pushchair. Or more than one child. It's a nightmare.

It would be far less of a problem if parents didn't keep their kids in
pushchairs for much longer than used to be the case - it encourages the
use of large buggies and sets the seeds of obesity in many children.

Back in the 50s, most kids were out of pushchairs and toddling on reins
by or soon after the age of 2. I don't know why reins are so rarely used
these days, as it is so much easier to pick up the toddler where
necessary (on escalators or while 'minding the gap') than trying to
manipulate some huge baby limousine on and off buses or the tube.
--
Paul Terry