You either love or hate the lack of latch on a brompton rear triangle - most owners love it because without bending down, and in 1 action you can fold the bike to half its length AND make it into a stable standing unit. Any few that hate it (eg when carrying the whole bike, non-folded up stairs) can buy an after market catch, or use loop of velcro / string etc. (I'd like a magnet, like on the strida wheels - but haven't yet figured it out ....... so it holds up stairs but releases with a sharp tap).

There are good reasons why all other folders are judged against brompton !