still be purchased for even if they are for earlier model years? Specifically, I was interested in the extended seat post (or telescopic seat post) to accommodate my height. I will definitely request original paperwork that certifies the cycle is not stolen. However, if it is being sold as 3rd hand (which some cycles are), how can I verify the cycle is not stolen. I suppose I could check it against https://www.bikeregister.com/ but can't think of what else I could do. I'd expect most new owners would have purchased the cycle on a debit or credit card and thus unwilling to depart from their receipt when they come to sell it. If there's any other tips or hints for a buyer of a 2nd hand Brompton then would very much appreciate having it shared. I suspect it may have been covered before so will also do a search. One other question is about the MK1, MK2 version etc. What is the latest MK version number and what year did that MK version start from? Brompton have a bit on their website where you can register your bike frame and serial numbers. I don't know if there's any way of searching that information to check the owner. Perhaps you could get the seller to log in and show you their registration. I guess if the original owner didn't register the bike then there's probably nothing to stop a thief registering it under a fake name so that's not foolproof. EDIT: Also