Nexus scholars services (before Covid) were able to be used by anyone and adult tickets were sold. I (when Deptford had the 454) had adults get on thr bus for a few stops or get on, realise there was 80 screaming kids and get off quite quickly. Despite being open to all, these services were never advertised on bus stop timetables. I'm not are what the rules are now about non school passengers using these services and if other ticket options are available.