http://dailycaller.com/2018/07/09/di...2016-election/
What suggests continuing GCHQ involvement is the British locus of subsequent spying and entrapping activity, such as approaches to London resident George Papadopoulos by Joseph Mifsud, Sergei Millian and Australian diplomat Alexander Downer, all occurring in March through mid-May 2016. Later Stefan Halper lured Papadopoulos, Carter Page and, unsuccessfully, Steven Miller to London for more entrapping initiatives. Indeed, GCHQ chief Robert Hannigan traveled to Washington in August 2016 to personally discuss the investigation with Brennan.
looks like British intelligence had a hand in creating the dossier...