Key points from article :
The free app will anonymously collect vital data on how far users travel over a 24 hour period.
Users will be asked for information about the number of people they have come into contact with during this time.
This data will be used to simulate the spread of a highly infectious disease to see what might happen when - not if - a real pandemic hits the UK.
The results of the experiment will be revealed in a 90 minute landmark documentary, BBC Pandemic which will air in spring 2018 on BBC.
