Andrew Roth was a biographer and journalist known for his compilation of 'Parliamentary Profiles', a directory of British Members of Parliament, which is available online in 'The Guardian'. A well-known figure amongst the politicians and journalists in Westminster for fifty years, he was also known for his appearances on British television. Wikipedia*
On the C-SPAN Networks:
Andrew Roth has one video in the C-SPAN Video Library; the first appearance was a 2013 Forum.