A few exciting milestones to look forward to:
7.6 million: over 1 in 7 UK adults will have received their 1st dose of vaccine
8.4 million: if we were vaccinating the first 4 priority groups in exact order, the top two groups plus the 75-79 year olds will all have had their 1st dose of vaccine
8.9 million: over 1 in 6 UK adults will have received their 1st dose of vaccine
10 million: it’s 10 million, what more can I say!!! 
10.6 million: exactly 1 in 5 (20%) of UK adults will have received their 1st dose of vaccine
11.7 million: if we were vaccinating the first 4 priority groups in exact order, the top 3 groups will all have had their 1st dose of vaccine
13.25 million: exactly 1 in 4 (25%) of UK adults will have received their 1st dose of vaccine
13.9 million: we’ll have vaccinated the top 4 priority groups!