If you have had a ReformUK Ltd leaflet through your door and you've opened it because it was a letter addressed to you, you might like to know the printer that distributed this material.
I have opted out of such material via D2D, MPS and the DMA, but they appear to have ignored this.

https://www.hps-ltd.org.uk/contact

#ReformUK #UKPol

Contact — HPS

Contact

HPS
@MostlyTato All political parties have legal access to the full electoral roll. That's where RUK got your address. It's standard practice for parties to use that information for pre-election materials. Opting out of marketing lists has nothing to do with it.
@MarjorieGotSmaller
But RefromUK Ltd isn't really a political party, its a political movement run by a private limited company that used to be The Brexit Party Ltd.
They may well have access to the electoral role, they may have a political message, but what they are sending is technically, as far as I can see given their structure, advertising.