Rating of electric cable used to supply cooker panels?

[Radio Fixer]

"It is not permitted to change the fuseboard without testing the entire installation. This may involve a certain amount of judgement as to what parts, if any, need to be upgraded or replaced. Typical issues on older systems may include older 2.5mm cable which has only 1mm earth rather than 1.5mm and lighting circuits with no earth conductor at all. Neither of these is an automatic fail. The smaller earth conductor will be more than adequately protected by the new RCDs and unearthed lighting circuits can be re-used provided none of the fittings requires an earth. All these deviations must be recorded on the certificate that must be issued by the installer."

All very scary for me as that's what is going to happen. I just have to hope that the 'sparks' is more reasonable in his judgement than came across on site inspection with the builder. Its not just cost but the disruption and add on work that an unreasonable approach can cause. I really don't want to get in to re-decoration of walls in other rooms not on the current agenda.

So fingers crossed although I have already checked all light fittings for earths and all power points for being correctly wired.

thanks Gary