From the Eurostar website:

Most Eurostar services can be booked up to 120 days in advance of the return date of travel.

Journeys that involve a connection with the French national railway network can be booked up to 90 days in advance of the return date of travel.

The Eurostar can be booked 90 days in advance NOT 9 months! Why is Palenque giving advice on a service he never appears to have used?>

Why are you criticizing me thru total ignorance?

schalland - you accuse me of never riding the Eurostar trains - quite without any reason as i have ridden themmaybe 30 times. And thru RailEurope you can indeed book Eurostar trains up to nine months in advance - i should have clarified that previously but what i said was correct. And if one wants to really be guaranteed a decent fare say in really busy periods - like weekends in summer then they may want to lock in a fare thru RE that far in advance.

Before accusing someone of something you should yourself know what you are talking about - even your 90 days was wrong. before casting stones know what you are talking about, which apparently you do not so i advise you to stop giving advice about something you apparently know very little about.