How does an advertising self-regulatory organisation (SRO) handle a complaint alleging that a tweet by the Prime Minister is misleading? Most SROs decline to regulate political advertising because of the inherent difficulties of a SRO regulating politicians who are in the business of regulating others rather than being regulated by an organisation over which they have no control.
One SRO has successfully regulated political advertising for the past 25 years. The Foundation for Advertising Research has written a paper on the subject which is available on this link –