What/Where is the best (cheapest) place to book Eurostar tickets from UK to Disneyland Resort Paris?

Question

Traveling from our local town and then from St Pancras station in mid-August.

Answer 1

www.eurostar.co.uk but book at least 4 weeks before you want to travel but less than 6 months to get best prices.

they offer pre-booked off-peak tickets with tickets to/from your local station as well but its often cheaper to book them via your local train operators website again 1 to 6 months before you travel.

but to get cheapest seats you MUST reserve a specific seat on a specific train! and there are no cancellations or alterations allowed.