https://www.theguardian.com/us-news/2018/apr/06/facebook-suspends-aggregate-iq-cambridge-analytica-vote-leave-brexit

AggregateIQ, which played a pivotal role in the Brexit campaign, suspended after reports it may have improperly obtained user data

Facebook has suspended the Canadian data firm that the official Vote Leave campaign spent 40% of its budget with, as the Cambridge Analytica scandal continues to unfold.