Cyberattacks that meet upper severity thresholds set by the UK government's cyber agents have risen 50 percent in the last year, despite almost zero change in the volume of cases handled.

GCHQ's cyber arm, the National Cyber Security Centre's (NCSC), said in its annual review published today that its incident management team handled 429 cyberattacks on organizations in the past 12 months, one fewer than the same reporting period in last year's review.

However, the number of nationally significant attacks stood at 204, a 48 percent increase year on year, and the number of highly significant attacks stood at 18, a 50 percent increase on last year – the third marked increase in as many years.

The NCSC has six categories of attacks, ranked in DEFCON style:

NCSC chief exec Richard Horne sai

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