When looking for REIN with a MW radio Its also worth looking at other frequencys beyond 612 KHz, try the next harmonics, that is 1 1/2, 2, 2 1/2 times the 612 KHz range. Sometimes the REIN may show itself at higher frequencys more easly. the main problem with this is that you may start chasing all sorts of other noises which may not have any affect on your DSL.
I never had the chance to work on vDSL so I wouldn't know about any querks there. the problem with REIN which I would think is still the case. Is that this wasn't something realised when the whole system of how a dsl fault is processed when this was organised between offcom,isp's,bt wholesale, openreach. So who pays for a REIN fault and how is it accounted for. never mind finding some poor mug to become a REIN engineer.