I've been REIN faulting for a number of years now, and the way I was told and still appears to be the case, is that we have no powers to remove offending items from EU's premises or 3rd party premises.
That is apart from amateur radio hams. The reasoning being that they are knowingly broadcasting as opposed to say a 3rd party who has cheap LED lighting that emanates HF noise.
I have only had one Ham's equipment found to be a source of REIN (In the beautiful Ribble Valley), and he was more than helpful.
As regards your comment, "BTOR aren't willing to do anything about it". We have already gone outside of our current remit and investigated the source of the REIN affecting your circuit ..... for free !! Openreach don't get paid to do this from anyone, it is a goodwill gesture.