Ohme have put their hands up and said they failed to add enough detail when getting contractors to carry out the works.
Ohme are purely the manufacturer, who contract through a third party body the installation of EVCP’s by supposedly qualfied electricians, who should be suitably qualfied in the installation of EVCP’s.
As a qualified electrician, it is your individual responsibility to ensure the insallation of the EVCP is carried out to BS761 18th edition A2 and in particulary chapter 722 of the regulations.
The onus therefore falls on the electrician to either halt the install or approve further funding to carry out the work according to BS7671 722.311.201
In your case the electrician knowingly removed the CT clamp from the meter tails after realising it was part of a wireless device, not compatible with the Ohme charger and made no attempt to remedy their actions to a satisfactory standard and would be liable for their failure todo this.
Did they even test their installation or just cut and run!
No escuse and an assessor should have been involved code 2 ing their work after this, rather than it brushed under the carpet.