“We estimate that since its introduction, HPV vaccination has prevented nearly 200 young women from dying from cervical cancer in England.”

Given that the youngest vaccinated women are ~31 now, we would expect rates in that cohort to remain lower than in prior cohorts. But, crucially, we have to wait for this cohort to age to know for sure.

Treat this as a check-in as part of a 50-year longitudinal study that will keep yielding new data for another 40 years or so. (I don't know if it will be the same actual study, but the data will be there.)