Neil Brown

New blogpost:

"What number of UK users constitutes a 'significant number' for the purposes of the Online Safety Act 2023?"

tl;dr: Ofcom seems to regard a service as having a “significant” number of UK users if it has more than 855 monthly active users and fewer than 50,000 monthly active users, but exactly where the boundary is remains unclear.

https://decoded.legal/blog/2026/03/what-number-of-uk-users-constitutes-a-significant-number-for-the-purposes-of-the-online-safety-act-2023/

#OnlineSafetyAct #blog

What number of UK users constitutes a 'significant number' for the purposes of the Online Safety Act 2023?

Ofcom seems to regard a service as having a significant number of UK users if it has more than 855 monthly active users and fewer than 50,000 monthly active users, but exactly where the boundary is remains unclear.

Mar 24 at 2:18pmWeb
Show threadRevK 1d ago

@neil What is a monthly active user? Someone visiting a web site (no auth or tracking to identify they are a user from click to click)?

Or is a user somehow authenticated?

Show threadDaniel1d ago
@neil fyi, the bullet points seem to have gone wonky. on my firefox browser they're shown inline in one big paragraph instead of starting new lines
Show threadNeil Brown1d ago

@dan

Thanks - yes, rebuilding to fix that.

Show threadColin Macleod1d ago
@neil "What number of UK users constitutes a 'significant number' for the purposes of the Online Safety Act 2023?" - as usual, Ofcom is as clear as mud! 😒