sentences:  He was also impressed that Marr maintained his penetrating scrutiny and level of insight throughout the series.Lucy Mangan noted that the show shone a light of understanding into hitherto dark and musty corners of ignorance, but criticised the final episode for concentrating too much on Tony Blair's "People's Princess" speech after Princess Diana's death.In 2009, Marr's publisher, Macmillan Publishers, was successfully sued for libel by activist Erin Pizzey after his book "A History of Modern Britain" claimed she had once been part of the militant group Angry Brigade that staged bomb attacks in the 1970s.