So far as I can tell, it has only been broken for the fully vaccinated, but for those not yet vaccinated, or not fully vaccinated, the delta variant is more dangerous than all the variants which came before and the link has not been broken for those people.
Even with the UK's good vaccination program, most people are not fully vaccinated yet, and won't be for months because of the time delays between vaccination for best effect, as well as the waiting time after the second one before it reaches maximal protection.
There are also people who would like to get their first vaccination, but are currently ill with something else and so rationally have to avoid the first vaccine for a while.
So although the overall statistics look better than previous waves, that should not be any comfort to those who are now going to be exposed to greater risk than in previous waves.
I would like to see more emphasis on statistics showing the risks to people who are still at risk, not the current presentations which imply a substantial minority of people's lives don't really matter because the overall numbers are down.
I worry mostly for the people who are still at risk (though hidden by the aggregate statistics), who will be forced to go back to work in unsafe environments, now that the law will no longer support them working from home, no longer requires others at work to wear masks or keep a distance, and no longer requires adequate ventilation.
As for public transport. Let me put it this way. 19th July is the day when I would recommend to stop using public transportation (tube, buses, taxis, trains), because it's the day the air will immediately become more dangerous in enclosed spaces.