NEW: Without action, UK could have 50,000 new COVID cases *a day* by 13th October.

According to slide three from today's No 10 briefing:

The final 3 slides:

Vallance: In every age group we've seen an increase in cases. Highest increase amongst 20-29 year olds.

Vallance: 'Deaths will follow'.

But bad news on immunity: fewer than 8% of people have developed antibodies to the virus.

i.e. 'The vast majority of us are not protected in any way and are susceptible to the virus.'