The Institute for Strategic Dialogue (ISD) has uncovered a range of digital influence campaigns targeting the European Parliamentary elections through a mix of social media mapping, undercover online reporting and media monitoring. This interim briefing paper addresses who is behind these malign influence operations and analyses the techniques they use. It also assesses the record of the tech companies in addressing these threats to electoral integrity. A full post-election analysis will be published in the coming weeks and experts at ISD can be made available for comment on the election results.