As confirmed Covid-19 cases in the UK rise and rise the system for testing and tracing people with the virus has never been more vital in controlling its spread.
Yet despite how important a functioning test and trace system is to the country there's very little information available on the organisations involved in running the English system - especially the private organisations that have been handed multi-million pound contracts by the government without timely public disclosure or competition.
In fact it's so complicated, sometimes it seems even the government doesn't know who is doing what.
