http://www.bbc.co.uk/news/technology-12791376 The BBC News of 11.03.18 reported that UK commercial Internet Service Providers (ISPs) are insistent that they have the right to sell Internet service at least at two levels or tiers of bandwidth. Bandwidth in this case means selling a guaranteed minimum bandwidth and a peak maximum speed of data transfer. The article surveys the various ways that ISPs are already controlling, or throttling, Internet bandwidth for different classes of devices such as mobile smart phones.