EICR - would this be inspected?

[JohnW2]

Agreed, seen it many times, the old regulation had a full stop before it referred to single core cables, which some selected not to see ...

You've often written that, but I've never understood. In the original version of BS7671:2018 (and probably earlier editions), not only did the sentence in question have "a full stop before it", but the one sentence constituted the entirety of a paragraph, namely ...

Single-core cables identified by green-and-yellow throughout their length shall only be used as a protective conductor
and shall not be overmarked at their terminations, except as permitted by Regulation 514.4.3.

This statement explicitly singling-out of "single-core cables" surely meant that, in a multi-core cable, it was permitted for a G/Y conductor to be used for something other than a protective conductor,with overmarkings' (over-sleeving) at the terminations, didn't it? (514.4.3 relating to PEN conductors) ... so what is this that you always say about 'the full stop'??

As you say, that statement was changed in Amd 2 of BS7671:2018, such that it now reads (with my emboldening) ...

Single-core cables and conductors in multicore cables identified by green-and-yellow throughout their length shall only be used as a protective conductor
and shall not be overmarked at their terminations, except as permitted by Regulation 514.4.3.

...so that the prohibition of oversleeving G?Y and using it as a live conductor is now prohibited in multi-core, as well as single-core, cables

.... I have many times looked in a wiring centre to see green/yellow not used as an earth.

If the G/Y conductor is not oversleeved at its terminations, that means that G/Y markings are being used to 'identify it', and that has never been allowed if it is being used as a live conductor....

514.4.2 Protective conductor
The bi-colour combination green-and-yellow shall be used exclusively for identification of a protective conductor and this combination shall not be used for any other purpose ...