Thank you for the prompt to get off my ass on this.
I have read up on DC Profiling in Raw Pedia and will get an Std A clear tungsten bulb ASAP.
The outdoor shots (D65) should not be a problem - sunny days are back here again London.
I assume the shots with the Std A will need to be taken in a darkened room to exclude all other extraneous illumination.
I might even get an colour checker - sometime