A British supporter of the ISIS terrorist group has been jailed for eight years after sending “extremely graphic” execution videos to an undercover officer. Ibrahim Anderson, 44, was sentenced on Wednesday to eight years in prison with a Serious Crime Prevention Order for a period of five years upon his release. He will serve two-thirds of his sentence before being eligible for parole. Anderson was arrested on Oct. 21, 2020, and pleaded guilty in April to 10 counts of disseminating terrorist publications, four counts of possessing terrorist information, and one count of breaching the terror notification requirements that he was subject to after being released from his previous prison sentence. The Luton mechanic—born Andrew Anderson—was jailed for three years in 2016 for inviting support for ISIS outside Topshop in London’s Oxford Street in 2014. Anderson has also served a sentence for robbery in the 1990s, during which he converted to Islam. The father …