Wondering if anyone can help me with the delights of booking rail travel. I'm trying to book 2 journeys for myself and my 4 year old daughter. The website says under 5s travel free but I don't particularly want her sitting on my lap for 3 hours and there doesn't seem to be a way of reserving her a seat next to me except by paying another fare. Are there any experienced rail users out there who know how this all works?