DJBaggySmells
It's the interesting conflation of what are human rights and what are generally referred to as economic or second order rights. Conventionally human rights are things like right to free speech, freedom from bodily harm, etc. Things that no-one has to provide anything for- by having a right to free association all I am insisting on is that people are not going to interfere with my activity (and I am likewise constrained from interfering with others).
Second order rights are often called economic rights- things like health care and education. When people insist that things like health care and education are human rights (in the sense of first order rights) then they are things that people must supply. If I have a right to healthcare in the same way that I have a right to freedom of association then someone, somewhere, must be obliged to provide me with that service. The NHS was never conceived of in that sense however it has grown and as a state service the state is obliged to fulfil its duties to its citizens (I.e.: their rights).
Most of the things that the trans manifesto is demanding are second order rights- very little in there is demanding freedom from anything as such, it's almost entirely freedom to have something.
Thus- if we didn't already have the NHS they wouldn't feel entitled to demand access to a series of extremely expensive medical services which someone will be obligated to provide once people start taking this manifesto seriously (which people seem to do on trans issues for some reason? No matter how incoherent...)