I am about to do this online, and they are asking me where I want to sit, so I can have a seat reservation for me. They ask what type of seat I would like (window, rear facing etc) but not if I want two extra seats for non fayre paying children? I think that if I get a seat reservation I probably won't use it as not suitable. It will be an exciting 1.5hour train ride that's for sure. Anyone any experience here?