‘ His US team wouldn't be able to use firearms and don't have info that the police would have. He is happy to pay for UK protection like Blair does’
This.
Harry can hire the services of elite security crew whilst here in the UK, as do many others of high net worth, high profile, high risk etc etc. Said security consultants operate entirely within the UK law about carrying weapons, are often ex UK elite military & said firms have well established operational communications protocols with UK security services. Harry is free as a private citizen to engage such protection at his own expense.
What he cannot do, determined by the UK Home Office, is call upon the protection of the UK specialist services that protect the RF who qualify for specialist &/or armed protection either on his own account as a born royal or as a private citizen for a fee. Said specialists are not available for hire.
The judicial review will look at the processes involved to make the Home Office decision & test if that decision is right &/or robust.
All this a storm in a tea cup of narcissistic rage because Harry cannot get what he wants. He teeters upon becoming a vexatious litigant, using the courts to claw out of the RF what he deems he deserves. I have some warped compassion for the Ginger Winger as he struggles to adapt to a royalty-free, privilege-lite more challenging ordinary life, left to earn a living to support himself & his young family, & to find out that the cheeky chappy persona crafted for him by the Men in Grey cannot be sustained with the support of the royal machine.