Boris Johnson says contact tracing should only force a very small number of people into quarantine

The best estimates suggest that if there are 10,000 fresh cases a day, then as many as 390,000 new people would be quarantined each day

This is the second time I& #39;ve heard this claim today from someone high up in the contact tracing scheme

I think we& #39;re roughly close to 10,000 new cases a day at the moment - so I wonder what& #39;s changed since @AdamJKucharski et al published this paper?
https://cmmid.github.io/topics/covid19/reports/bbc_contact_tracing.pdf">https://cmmid.github.io/topics/co...

Now Boris Johnson says he& #39;s set a target for all tests results to be returned in under 24 hours

Is he aware that his team believe doing home tests this quickly is impossible - for the understandable reason that it& #39;s impossible to teleport swabs? Or is he ditching home testing?