CEST and MOO
In court cases, one of the most important considerations with regard to employment status is "Mutuality of Obligation" - whether or not the employer is obliged to provide more work, and the worker obliged to accept.
For an employee this is true, for a contractor it is not.
The CEST tool *assumes* mutuality of obligation is in place.
Case completely, utterly and totally unfit for the purpose of determining employment status.
It is however completely fit for what I cannot help but think is its real purpose, which is to classify as many people as possible as employees, to literally scare them into tugging the forelock and handing over that much more of their pay in tax.