I don't know if anyone else has noticed this yet, but if you want to go on a day trip from London to Lille on a Saturday, going out on the first departure from St Pancras and returning on the last departure from Lille, the minimum cost of a ticket is £199. And yet if you want to do a day trip to Brussels on exactly the same trains, the minimum cost of a ticket is £69.
This issue only affects the trains specified, and only on Saturdays.
On querying this with Eurostar, they said that this is due to these trains being used as connecting services for the ski train to Switzerland, and the only way they can get the booking system to work is by pricing London to Lille tickets (in both directions) as if they were tickets all the way from London to Switzerland.
Personally I find this hard to believe. For one thing, the ski train does not run in the summer, and yet the issue is still occurring. Secondly you can book through tickets from London to destinations in France and elsewhere without having the same issues.
This issue only affects the trains specified, and only on Saturdays.
On querying this with Eurostar, they said that this is due to these trains being used as connecting services for the ski train to Switzerland, and the only way they can get the booking system to work is by pricing London to Lille tickets (in both directions) as if they were tickets all the way from London to Switzerland.
Personally I find this hard to believe. For one thing, the ski train does not run in the summer, and yet the issue is still occurring. Secondly you can book through tickets from London to destinations in France and elsewhere without having the same issues.