What difference in vetting is there between Black Cab drivers and Minicab drivers in London?

What difference in vehicle maintenence?

The vetting process may be flawed, but it's flawed in both hackney carriage and phv licensing. This was acknowleged by say Milton Keynes, which gave a Hackney + PHV license to an applicant with convictions for rape and other serious sexual offences [0]

I have no confidence in London that the vetting process works, and the authorities are far more interested in retaining an obsolete cartel. Rather than fix their vetting procedure (which has always allowed dodgy minicab firms, which were never a threat to the powerful black cab industry), they concentrate on Uber.

[0] https://www.milton-keynes.gov.uk/pressreleases/2014/aug/taxi...