Yes the cloned car will show up as having no insurance once I have changed my reg & informed my insurers as well as being a cloned reg number but if it is picked up by a camera then the camera unit will have no address for the vehicle.
If it is spotted by a Police patrol car then that is another matter.
Once I receive my new V5 & reg number I will inform my insurers & the RAC.
I don"t have to do anything about my MOT as although it will be in a different reg DVLA/VOSPA apparently attach a not on their system to say the reg of the vehicle has changed then when I next MOT it it will be done in the new reg.