Hi. In July we are travelling to Cannes. We will be travelling to London by South West Trains, London - Lille by Eurostar, Lille - Lyon and then Lyon - Cannes. Obviously this will not be cheap and we will need to take advantage of grabbing cheap tickets as soon as tickets go on sale. Does anyone know how many days in advance it is possible to buy tickets for each leg of the journey, or, if not, where one can find out?