Ah, yes, I'd forgotten that it was only a 'replacement' of an existing cable - which, as you say, has always been non-notifiable in both countries.Doesn't change anything. ... Replacing a damaged cable isn't notifiable in Wales or England and never was.
However (for the benefit of the OP), my 'correction' of what chivers says still stands - that contrary to what he suggested, whilst most outdoor work is, per se, still notifiable in Wales, it is not in England unless it involves a 'new circuit' (and hasn't been since around 2013, if I recall correctly).
Kind Regards, John