NHS Test and Trace's remit is to find people who have come into close contact with those infected by the virus, thus enabling the lifting of blanket lockdown restrictions and a potential shift towards more localised measures should they be required. The organisation employs a team of (initially) 25,000 contact tracers who contact people who have newly tested positive for COVID-19 and ask them about their recent movements, before identifying others they may have come into contact with. Those people are then asked to go into self-isolation for two weeks. The contact tracers are employed by
Serco, who in turn (as of September 2020) have 29 subcontractors;
Serco were paid
£108 million for the first phase of the work, up to late August.
The call centre is operated by American specialists Sitel, who were paid £84m for the first phase. In November 2020, Dido Harding described it as "the largest outbound calling centre in the UK".
All components – administering tests, processing samples in laboratories, and contact tracing – are contracted to private companies. Multinational consultants Deloitte handle testing logistics, including collection of statistics, and in turn appointed outsourcing companies
Serco, Mitie, G4S and Sodexo, together with the Boots pharmacy chain, to run drive-through or walk-in test centres. In October 2020 over 1,100 Deloitte consultants were engaged, and the system was reported to have a budget of about
£12 billion.