Kevin Campbell s 2007 paper Geographic Patterns of Haplogroup R1b in the British Isles can not legitimately be used as a reference for any part of the section on R L21 R1b1b2a1a2f or R1b1b2a1b5 For all practical purposes L21 was not discovered until October of 2008 Later that same month commercial testing for it began Campbell s paper predates the discovery of and commencement of testing for L21 yet it was cited to show that L21 is common where immigrants from the British Isles settled One has to wonder why such a comment was included in the section on R L21 in the first place since undoubtedly all the R1b1b2 subclades that are common in the British Isles are also common where immigrants from the British Isles settled Why single out R L21 for that distinction unless there is some agenda at work