Update: my car was run through the diagnostic scan and confirmed these faults
B1304-04 Electronic power steering
B1304-16 Electronic power assisted steering.
They carried out a battery test, measured at 630amps for a 800amp battery.
They fully charged the battery, all codes cleared and steering had returned.
Been advised, if fault returns, firstly replace battery to eliminate that from diagnostic process, there’s a chance it may still need a new steering rack if fault continues. So far day 3 and all is running fine.