Some people on this forum have illegally obtained the items needed, but that does not change the problem here.
FYI I have spoken to almost all the key manufacturers asking for permission to ship the fitting software to those of my clients who ask for it and who seem to have the skills to use it e.g. electronic engineers, acoustic specialists, software people and so on.
In all cases the answer has been NO … primarily due to the liability and insurance issues.
I do believe however that some highly qualified electronic engineers (not in the UK) have approached the manufacturer of their aids directly and have managed to obtain legal licenses for the appropriate fitting software on a ‘special case’ basis. I assume that they are believed sufficiently skilled technically to avoid invalidating the manufacturer’s insurance.