Matt Hancock, who resigned as health secretary in the midst of the pandemic, and his memoir's co-author Isabel Oakeshott, who subsequently handed over confidential information he gave her to The Daily Telegraph, have both come under heavy public criticism.
But they also performed one important public service by revealing the central role played by WhatsApp for communications between ministers and others during the crisis.
The cache of over 100,000 messages - more than two million words' worth - which Mr Hancock downloaded from his phone and gave to Ms Oakeshott, provided the substance for their self-justifying book Pandemic Diaries and for the revelations in The Telegraph's Lockdown Files reporting.
Thanks to Ms Oakeshott's betrayal, the Hancock messages are effectively in the public domain.
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So what about all the other informal communications in 2020, 2021 and 2022 inside government during COVID-19? Surely they should be gathered in the evidence for Baroness Hallet's official UK COVID-19 Inquiry, which will start hearings in a few weeks' time?
Lady Hallet has already assured "the bereaved that this inquiry is in the process of obtaining all relevant WhatsApp messages from all relevant groups, not just those from Mr Hancock".
The government must be regretting giving Heather Hallet, a retired justice of appeal, such a wide-ranging remit for her inquiry. Alongside other vital matters such as how the health services dealt with patients and the pandemic, she is instructed to examine "how decisions were made, communicated, recorded, and implemented" in "the public health response across the UK."
This puts Boris Johnson, his ministers and their advisers in her sights from the very start of the pandemic.
On Thursday, the government took the remarkable decision to take legal action against the inquiry it set up in an attempt to avoid handing over the unredacted emails of the then prime minister, Mr Johnson.
The bitter tussle over disclosure involves Lady Hallet, Mr Johnson, the courts, the Cabinet Office, and ultimately the current prime minister, Rishi Sunak.
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Yet the nature of modern communication means whatever is handed over cannot give a full picture. Messaging by WhatsApp is an easy option for hard-pressed ministers and an invitation for ill-judged comments.
It also usually leaves a trail, if that can be accessed. WhatsApp messages can also be lost or deleted, or conducted in other conversations on undetected devices.
Lady Hallett is taking a tough line. She insists it is not up to the Cabinet Office to decide what internal government communications and messages, formal and informal, are relevant to her inquiry.
She wants to see everything: WhatsApp exchanges, emails, minutes, notes and diaries, "including the other (superficially unrelated) political matters they were concerned with at the time" - because it is possible a minister dealt with COVID matters "inadequately because he or she was focussing (perhaps inappropriately) on other issues".
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