Seems to have now been posted to BSI, comprising the changes suggested by Lyle and Andy (I haven't checked if they are verbatim).

If this is all it is... I confess I need to check the books but is this not already a requirement?

Also, to have been rushed out in this fashion, presumably this is in response to a specific incident(s)? Either way would it not be reasonable for BSI/IET to publish a supporting note justifying the change; this should illustrate where there is a (percieved) deficiency / gap in the existing standard.

Technical question wth regards to Amendment 3.
Will this be classed as a C1 or C2 on an EICR if a Unidirectional is fitted rather than a Bi-Direction if it is fitted to Micro-Generation like a Car2Grid or when doing PV to Grid?  Also would it require a replacement breaker as the wording in the proposed Regulation states SHALL?  

Sorry have just gone back and looked, the IET say on the BS7671 portal

The amendment follows a bulletin from BEAMA which aimed to clarify the differences between connections for unidirectional and bidirectional RCDs and circuit-breakers.

which would appear to refer to this

https://www.beama.org.uk/resourceLibrary/beama-technical-bulletin---connection-of-unidirectional-and-bidirectional-protective-devices.html

Sorry have just gone back and looked, the IET say on the BS7671 portal

The amendment follows a bulletin from BEAMA which aimed to clarify the differences between connections for unidirectional and bidirectional RCDs and circuit-breakers.

which would appear to refer to this

https://www.beama.org.uk/resourceLibrary/beama-technical-bulletin---connection-of-unidirectional-and-bidirectional-protective-devices.html