According to the August numbers on my spreadsheet:

Total population of England is about 56,223,000 (about 82% of total UK population).

People in England who've had both vaccine shots = 34,511,819 (61.38% of population)

Unvaccinated people in England = 17,177,893 (30.55%)

Unvaccinated Delta cases in England = 183,133 (1.07% of total unvaccinated)

Fully vaccinated Delta cases in England = 73,372

(0.21% of fully vaccinated population)

1.07% divided by 0.21% = 5.14 times as many infections in unvaccinated for the population.

Unvaccinated Delta deaths in England = 390 (0.21% of unvaccinated cases)

Fully vaccinated Delta deaths in England = 690 (0.93% of fully vaccinated cases)

0.93% divided by 0.21% = 4.43

So, if a fully vaccinated person does catch Delta, they are 4.43 times as likely to die from it than an unvaccinated person.