Sources

Sources and references

We only use statistics we can trace to a published source, and we show you where they come from. Numbers change when new research is published, so we re-check every link each month and review each figure at least once a year.

If a link has moved, or you cannot find a figure, search for the publisher and report title. It is a good habit to look up a statistic for yourself before you share it, and it is exactly what the course teaches.

Statistics

Every number we show students and visitors, where it comes from, and where it is used. Figures were last checked on 2026-10-04.

FigureWhat it measuresSourceWhere we use it
1 in 5 (19.1%)Children aged 10 to 15 in England and Wales who experienced an online bullying behaviour in the last yearOffice for National Statistics, Bullying and online experiences among children in England and Wales: year ending March 2023 (2024)Module 1 intro; homepage
18%Children who experienced online bullying and told no one (18.1%)Office for National Statistics, Bullying and online experiences among children in England and Wales: year ending March 2023 (2024)Module 1 intro; homepage
23.2 millionHacked accounts worldwide that used the password 123456National Cyber Security Centre (NCSC), Most hacked passwords revealed as UK cyber survey exposes gaps in online security (2019)Module 2 intro
22%Data breaches that began with stolen login details (credential abuse), the most common way inVerizon, 2025 Data Breach Investigations Report (2025)Module 2 intro
35%Children aged 10 to 15 who accepted a friend request from someone they did not know in the last yearOffice for National Statistics, Bullying and online experiences among children in England and Wales: year ending March 2023 (2024)Module 4 intro
55%Children who report receiving direct messages from people they have never spoken toOfcom, Understanding online communications among children (2026) (2026)Module 4 intro
£1.28bnStolen through payment fraud in the UK in 2025UK Finance, Annual Fraud Report 2026 (2026)Module 5 intro
85%UK businesses that had a cyber breach or attack in the last year and experienced phishingDepartment for Science, Innovation and Technology (DSIT), Cyber security breaches survey 2025/2026 (2026)Module 5 intro
38%All UK businesses that reported phishing attacks in the last yearDepartment for Science, Innovation and Technology (DSIT), Cyber security breaches survey 2025/2026 (2026)Module 5 intro
59%Links shared on Twitter that the person sharing them had never clicked (2016 study)Gabielkov, Ramachandran, Chaintreau and Legout, ACM SIGMETRICS, Social Clicks: What and Who Gets Read on Twitter? (2016)Module 6 intro
6xTime true news took, compared with false news, to reach 1,500 people on TwitterVosoughi, Roy and Aral, Science, The spread of true and false news online (2018)Module 6 intro
3 in 1012 to 17-year-olds in the UK who do not know how to spot a fake social media profileOfcom, Children and parents: media use and attitudes report 2025 (2025)Module 6 intro
about 3 hoursAverage time online each day for 8 to 14-year-olds; time online almost doubles by ages 15 to 17Ofcom, Children and parents: media use and attitudes report (2026) (2026)Module 7 intro; homepage
37%8 to 17-year-olds who say their screen time is too highOfcom, Children and parents: media use and attitudes report (2026) (2026)Module 7 intro
70%8 to 17-year-olds who use social media or messaging apps and feel pressure to be popular online at least sometimesOfcom, Children and parents: media use and attitudes report (2026) (2026)Module 7 intro

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