Hi, yes - we reviewed a number of different field based editing apps during our pilot testing phase of the project, to include StreetComplete. At the moment, we have decided to use of Vespucci as it seems to have a greater ranger of editing functionality, though we recognise StreetComplete is perhaps more user friendly! The GIS Trails team are aware of all of the options and will make use of both, as appropriate. 

Similarly, we are in discussion with two OSM UK board members, and our development team around automating things like What3Words, but have yet to finalise this. Regardless, it is helpful to have feedback and be pointed towards member roles as this may be helpful for routes with alternative / seasonal sections of trail, so thank you again. NTTrailsLSE