The relationship between public and private healthcare has been a subject of regulatory scrutiny. Some aspects of private healthcare provision, including hospital providers and consultants, were the subject of a market investigation reference in the UK by the now Competition and Markets Authority (2012-2014). The outbreak of COVID-19 has raised further questions about sustainability and put these issues back on the regulatory reform agenda. It is important to take into account key aspects, including consumer choice, financial viability, quality, the role of insurance companies and interactions with the NHS. This paper outlines a proposed in-depth study which would review the current market and regulatory climate for the provision of healthcare in the UK, with a focus on the relationship between the public and private sectors. The aim is to sensitivity test potential future funding models that would tackle the range of issues, many of which have been given added imperative by the effect of the outbreak of COVID-19 on NHS waiting lists.