The secret API I used to tell LeShuttle about different outbound and return passengers

I’ve got an upcoming trip to France: I’ll be driving there through the Channel Tunnel, via LeShuttle. But owing to a quirk in our family travel arrangements, we’ve have a slightly different set of passengers in the car for the outbound leg than for the return journey. LeShuttle’s broken website This is something that LeShuttle’s Advance Passenger Information registration form ought to be able to handle… but it very-much can’t. You’d think that to specify different passengers for the return leg, all I’d have to do is uncheck that checkbox, right? Wrong! I was able to provide all of the personal and passport details of everybody on the outbound leg, but un-checking the “Return passenger information is the same” checkbox did… nothing. In fact, when saving the form and logging in again, the checkbox would be automatically re-checked.1 This is the point at which a normal person would either: Add the details of all passengers, both outbound and returning, to the form, and just hope they can…