OSM-Naptan tool not responding for a while

Hi, I used this tool in the past https://osm-naptan.andrewtrevena.co.uk/ to add Naptan data to new bus stops, however it has stopped working recently. I have tried to find a way to contact the owner but I can’t find anything. Does anyone know how to contact them, or are there other tools people are using?

It appears to be back online now :)