Thank you
C-W-S.
This part:
Passengers will be able to book a test from a provider on a GOV.UK list before arriving in England. If they choose to book a test, they will need to state this on their passenger locator form prior to arriving and then go straight into self-isolation at home as usual. If they choose to opt in after arrival, they will need to resubmit their passenger locator form.
makes me hopeful for a good integration with the PLF and some serious oversight. If that's what comes out I'll be happy to buy a hat and eat it.