I am curious, are the RSGB alone in their opposition to PLT?
They tend to be the people who are most affected by them, the HF Maritime and Aircraft services tend not to be near housing estates etc so don't pick up the noise except as a slight overall increase in background noise, they also wipe out the HF international broadcast bands which are supposed to be protected, but the general public doesn't tend to listen to them any more so they get very few complaints, but what is annoying is that they do not comply with the EU EMC regulations but they are still allowed to be sold.