Colin Rosenstiel wrote:
According to the National Rail journey planner web site a
Cambridge-King's Cross CDR with a Family Railcard is £11.90 for the adult
and £1 for the child. At Cambridge this morning National Express insisted
the child fare was £2. I can't get the online system to offer that child
fare.

Looking on the Chiltern-branded version of trainline.com, I also find it
as £11.90 Adult, £1.00 Child.

Working out the discount using a calculator, however, gives a Child fare
of £3.45.

Doing some digging reveals that First Capital Connect offer an
accompanied Child Flat Fare of £2.00, so that would seem to be the
correct fare, but I'm guessing the journey planner is mistakenly
discounting it.

HTH,

Barry