In our work on the issue of 084 / 087 numbers we have noted very many similar cases.
We have however disregarded them, for two reasons.
Firstly, because fax is generally used for B2B communication, which is generally treated and regulated differently. Secondly, as you say, because fax is now so fairly used, any impact is likely to be of little consequence.
The first two of these do apply in this case.
For the reasons stated above, the
has not put any effort into campaigning for compliance in respect of fax numbers.
We are however open to hearing views, in this forum, on why this may be an important matter.