Labour has suffered a second cyber attack on its digital platforms within the space of 24 hours, the party said.

A party spokeswoman said the distributed denial-of-service (DDoS) incident was being dealt with “quickly and efficiently”. It is understood this was a relatively “low level” attack.

The National Cyber Security Centre confirmed it would not be investigating the matter further, while a source said there was no evidence of “state-sponsored activity”.

DDoS attacks - where hackers flood a target’s online platforms with traffic from various sources, causing them to slow or crash - are considered relatively common.

Following the latest incident, a Labour spokeswoman said: “We have ongoing security processes in place to protect our platforms, so users may be experiencing some differences.”