Table 2.

Parameters used in simulation experiments.

Parameter	Value in experiments	Description
CTA users	0, 20, 40, 60, 80	% population over age 14 using CTA
Testing capacity	0, 0.5, 1, 1.5, 3, 6, unlimited	Maximum % of population that can be tested per week (reflective of UK policy announcements of 200,000 tests per day, corresponding to 2% of the population per week)
Compliance of CTA users	Low compliance: $\mathrm{\Omega }=0.5$ High compliance: $\mathrm{\Omega }=0.9$	Probability to self-isolate for CTA user without testing decreases by $\mathrm{\Omega }$: probability to self-isolate = ${\omega }_i\ast \mathrm{\Omega }$
Testing policy	a) Priority to symptomatic agents b) No priority	a) Each day symptomatic agents are tested, only then CTA users b) Agents are tested on basis of first come first tested
Initial conditions	7% recovered from the virus; 300 (0.3%) agents infected	Reflects UK estimates ahead of lifting lockdown