There seems to be some confusion here
This discussion started with a post about cases. A case only arises at diagnosis.
I made no comment about the rate of Infection. Infections will not become cases for at least a week, usually much longer.
Another factor which is rarely mentioned is that, I assume, hospitals will surely have got better at treatment so that fewer are dying?
The data seem to most people to show that the rate of spread declined rapidly as soon as we began social distancing, but that this decrease seems to be levelling off at a level which is too high for effective track and trace systems to manage.