Originally Posted by
NorthEasterner
If there are children under 12 on a reservation, it is MANDATORY that one adult pays for a reserved seat (the system won't continue with the booking otherwise). Then up to 4 children aged 12 or under receive a free seat which the person making the booking can select. This method won't work if you're booking last minute and seats together aren't available. There is no excuse for families with young persons being split up.
NE
Friends frig the system by paying for the fare and putting two of their kids in as adults.
Mind you I did this when it was £20 for a baby and fares were £1.99 for an adult