On a seperate but similar note, does anyone know why, despite FGW▸ 's website advertising that tickets can now be bought up to the 6th Jan, no advance tickets are showing. The same is true if you use Network Rail's site yet I have just managed to buy advanced tickets for 6th Jan using Southeastern's site.
Get to try out HS1▸ on this ojurney though which is quite exciting!
Just looked at a random journey for 6th Jan via FGW Website and it showed Advance being available as advertised.