Tom Quirk
Some old style consumer units 16th edition and previous had partial RCD protection, however with 17th edition and now 18th edition which commenced in July 2018, the laws are different for protection within the home. 17th edition required an advisory from the electrician if the consumer unit was not compliant, however if there was a shower cct present it must be red protected, there would be no impact on home insurance, unless the testing showed that there was a real danger of fire or death. 18th edition from January 2019 will require all consumer units to be RCBO, ensuring single cct protection, from what we have so far been told this will be a retroactive requirement