I would advise against it as a career path if I'm honest. PAs who have graduated are struggling to get hired as there is little confidence in them across Trusts, they are too expensive for the skill set required. Nurses can often do more than a PA can do and are cheaper, as well as having 3 years of training and clinical placements under their belt. Also it puts you in a limited position with how far you can progress your career.
I know people who work in various different roles in the NHS and there have been a ton of problems with PAs due to poor training or their not being qualified to actually do a lot of things in a ward setting. There's also the problem that they are often mistaken for doctors in care settings which is dangerous.
Generally within the NHS they are not seen positively by anyone other than the PAs themselves... stay clear.