Those labels on the CUs are also slightly worrying - they don't say to me that the guy took a pride in his work.Shame you think the gear that was used isn't good. Work was all done at the same time. I'll have a look for spur marks on the floorboards later
True.If no work is done using the garage wiring but taken from the house consumer unit instead then it still wont apply regardless of TN-C-S export issues.
There aren't any new regulations which apply to modifications to the garage supply. The issues surrounding the export of a TN-C-S earth to an outbuilding with extraneous-conductive-parts would have been just as relevant 2 years ago, if you have a TN-C-S supply and if the garage had had extraneous-conductive-parts.Looks like i'll be getting a new feed from the consumer unit through the house and out of the back wall if all the new regs will apply to a modification to the garage cct.