See, this is what I mean about there being a lot of misinformation out there. That £37 billion wasn't handed solely over to any one company - political opponents of the current government kept on falsely claiming that it was all given to Serco, but in reality only a small fraction of the Test and Trace spending went to them: https://fullfact.org/health/test-trace-march-2021/ (I think most of the money that went to Serco was ultimately spent on employing the numerous call center staff required to actually scale up manual contact tracing too.)