Facebook has suspended a Canadian data firm AggregateIQ that played a key role in the campaign for the UK to leave the EU. They said AIQ may have improperly received users’ data. It cites reported links with the parent company of Cambridge Analytica (CA), a British political consulting firm, which combines data mining, data brokerage, and data analysis with strategic communication for the electoral process. CA has also been accused of improperly accessing the data of millions. AIQ denies ever being part of CA or accessing improperly obtained Facebook data.The Vote Leave campaign paid AIQ £2.7m ($3.8m) ahead of the 2016 EU referendum. AIQ’s website once quoted Vote Leave chief Dominic Cummings saying: “Without a doubt, the Vote Leave campaign owes a great deal of its success to the work of AggregateIQ. We couldn’t have done it without them.” The quote has since been removed.