For anyone interested, yes, these are genuine leaked messages from the former UK Health Secretary: 
Discussion
Just awful.
Is the authenticity guaranteed? Or are we witnessing some ChatGPT concoction?
It was leaked to the Daily Telegraph, one of the UK's most reputable papers, by a named journalist who was his biographer, and has put her own reputation on the line. Government hasn't disputed their authenticity.
Thx for this info! Thought earlier it was fake. Glad/appalled it isn't...