I was talking to a good friend of ours who is an Openreach Engineer team leader..he has been using the app for about five years now since I told him about it.He was using it at work between his own team unofficially which he said was really useful.Now Openreach is using it officially ...he said it is so useful for finding faults and meeting other engineers etc at various sites where postcodes don’t exist.He showed me the app they use on his work phone and what they can do with it...which was all pretty impressive I thought.He did say how he thought you could improve it and he would be willing to talk to someone with the idea..I said I would let you know and if you are interested to let me know...