It looks like nothing has actually changed.
I think I've got to the bottom of the Notam, It seems that the AIP entries referred to where at odds with the VFR definitions in the ANO, and amending the notes in the AIP entry as this Notam says to do brings them into line.
Prior to the notam the notes in the AIP entry implied that <3000ft, surface in sight < 140kts was acceptable in any visibility which we all know is no longer the case.
There are at least 2 other notams which amend other AIP entries to take out this bit of amiguity also.
I'll get my coat.