Maybe I'm being cynical, but the article in the OP seems like a PR release for the recently launched Tutors' Association. The people behind it run the big tutorial agencies, who take a big cut from tutors' fees and are miffed that many tutors work entirely independently.
I work as a private tutor and currently tutor for 11 hours a week and have never used any of these agencies, although my details are posted on the "contact" websites First Tutors and Tutorhunt, which don't take a cut from the tutors. It's quite interesting that Neil Roskilly (the CE of the ISA) should be quoted in the article - he had a letter published in the Telegraph a couple of days ago www.telegraph.co.uk/comment/letters/10367680/Dumbed-down-exams-are-to-blame-for-low-literacy-and-numeracy-levels.html
It appears that the people behind the Tutors' Association would like private tutors to operate as mini private schools, which would massively increase the cost of tutoring, because tutors would have to pay a registration fee.
People need to use their common sense when hiring private tutors. My leads now come mainly from personal recommendations and I give parents a folder with my qualifications, a CV, a copy of my DBS certificate and references. However, somebody just looking for somebody to give a primary school child a bit of guidance with homework (for example) might really be looking for a bit extra with after-school babysitting.