https://tech.newstatesman.com/security/labour-party-cyber-attack-sophisticated

Early on Tuesday morning, the Labour Party’s head of campaigns, Niall Sookoo, sent out a mass email to supporters. “Yesterday afternoon,” Sookoo wrote, “our security systems identified that, in a very short period of time, there were large-scale and sophisticated attacks on Labour party platforms”. The attacks, he added, “had the intention of taking our systems entirely offline”.

The Labour leader Jeremy Corbyn has since described the incident as “suspicious”, while the party’s general secretary, Jennie Formby, said in a tweet that although no data had been breached, it was of “real concern”. But the timing of the announcement has aroused suspicion among some security researchers.