They'll be on parole for life if released after the minimum sentence and there's no guarantee they get released after the minimum sentence but the burden of proof would then be on them still being a risk, there's a handful of prisoners (maybe most famously Charles Bronson) who never get released
In the UK we have minimum terms. Basically the life sentence stands and if released on parole (after the minimum term) then they will be on licence which means they can be returned to prison at any time if it is believed they present a danger in general or break the terms of their licence, without trial.
We do have whole life terms but they are reserved for the most serious murders, such as serial killers
thank goodness he lived in the uk where the media, both major political parties, and a certain authorwerent also driven by transphobia.... cause that would be bad