I am a first responder for the ambulance service and get SMS messages with the location of the case as a GB OS Grid reference e.g. Job description, post code, (388610,338330). I would like to be able to have a process on iPhone running in the background, monitoring for these messages, which will activate on receipt of one.

The process would ideally then produce a notification (Siren sound, OK/Cancel) and if OK pressed it converts the reference to Lat/Long and sends it to TomTom or Google Maps or Apple Maps for routing.

Is there a jailbreak app that does some or all of this? I can have a go customising something.