Carradice Folding Bike Carrying Rucksack - Suitable for Brompton Models

I recommend this product

I bought this to take my Brompton on Eurostar. It was a total success. I cycled to St Panc's with the bag hanging neatly from the saddle and folded the bike and packed it away when I arrived. The bag is not overly big but the Brompton is an easy fit, including the Brooks saddle. At the other end of the journey I walked with my wife to our hotel carrying the bagged bike using the handles and shoulder strap. I did not try the back straps because I did not need them.
This bag has all the understated competence that I expect from Carradice. It is strong and effective.