The mk cu is a beauty. No wonder it failed the report looking at it now...
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If the bottom photo is your present consumer unit, there is no way a decent electrician would replace it
without first carrying out an inspection & test.
If the consumer unit is replaced, you can’t then energise circuits that are non-compliant or dangerous.
As an electrician, I would probably anticipate more DIY electrical work within the property carried out to the same standard.
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