3.5 million people currently infected, 93% of people have had at least one dose of vaccine, latest deaths per week is 412. This tells quite a powerful story.

High cases is a consequence of the removal of all requirements for self-isolation and social distancing, and the guidance that even if you test positive, you should still go in to work or school if you feel able.
This guidance may or may not be considered somewhat controversial, and whilst it is partly a consequence of the latest variant being less deadly than earlier variants, it's also a direct consequence of the high levels of protection conferred by what has been a hugely successful vaccination programme.

If you're interested in the data for the UK, this is a great source that has everything you need: https://ourworldindata.org/coronavirus/country/united-kingdom