The COVID-19 Contact Tracing App In England and ‘Experimental Proportionality’

In this analysis, we review the history of the contact tracing app developed by England's National Health Service and the differences of opinion over so-called ‘centralised’ and ‘decentralised’ technical approaches. The focus on data protection concerns has drawn attention away from more expansive human rights considerations, and we argue that human rights law should guide our assessment of the legal implications of a decision to deploy a contact tracing app. Acknowledging the uncertain situation presented by the coronavirus pandemic, we revisit our ‘experimental proportionality’ model first described in 2018. We demonstrate that, combined with a robust and rolling oversight function, this model of proportionality review could assist in upholding a fair balance between the rights of the individual and the interests of the community in situations of uncertainty and crisis.