My idea for an app is to provide detailed hospital site maps to assist journey planning.
The app would be available on mobile devices or NHS Choices and would include building entrances, wheel chair access, car parks, smoking area, seating and any other facilities that might be useful for visitors and patients, for all hospitals and large health facilities. The app would enable users to plan their journey from bus stops, car parks, drop off points etc right up to the correct building entrance. Many journey planning apps exist, but they don't deal with the final stretch to the building entrance, which for people with specific needs of mobility issues could be a real concern. OS Master map data would be ideal for the app, and being interoperable with existing journey planners like transport direct would improve its usability.