The video is pretty much what you have done already. Now this is where I think you are better of making it obvious what is in your luggage. So it is handled with care, rather than just being treated like other items. Put a sticker or sign saying 'BIKE' and 'THISWAYUP' so it doesn't get thrown around.
If you have replaced the standard Brompton pedals, then you should consider taking the drive side pedal off. In the video he has removable pedals, which he has taken off. Off course this means have to take a pedal spanner with you.
https://www.youtube.com/watch?v=UjZ7eRn0UD4
The video is pretty much what you have done already. Now this is where I think you are better of making it obvious what is in your luggage. So it is handled with care, rather than just being treated like other items. Put a sticker or sign saying 'BIKE' and 'THISWAYUP' so it doesn't get thrown around.
If you have replaced the standard Brompton pedals, then you should consider taking the drive side pedal off. In the video he has removable pedals, which he has taken off. Off course this means have to take a pedal spanner with you.