What You Need To Know About The UK Announcement To Ban Social Media For Under-16s

The UK government has announced plans to ban social media platforms from offering services to users under the age of 16, with legislation expected to be introduced before the end of 2026 and enforcement targeted for Spring 2027.

The policy forms part of a broader push to strengthen online safety, introducing stricter access controls, platform accountability and limitations on high-risk features. The UK Government aren’t the first to introduce policies like this, as Australia beat them to it in 2025, so we’ll explore what impact that’s left on our friends down under so far.

So, What’s Actually Changing?

The proposed legislation includes:

·       A ban on under-16s using major social media platforms

·       Mandatory age verification to prevent underage access

·       Restrictions on features such as livestreaming and communication with strangers

Default safety restrictions applied to 16–17-year-olds (e.g. limited functionality)

The ban is expected to apply to “user-to-user” platforms, with the ones listed below explicitly named in UK Government comms:

-          TikTok

-          Instagram

-          Snapchat

-          YouTube

-          Facebook

-          X

Messaging services such as WhatsApp and Signal are not currently included. Nor is Reddit, but it fits the “user-to-user” definition so you should expect it to be included when the legislation is introduced.

Platform Impact: Where This Matters Most

The impact won't affect all platforms or advertisers in the same way.  If you’re an advertiser that doesn’t target under 16’s, there’s no immediate impact or action to take.

But if you are, platforms with higher under 16 usage are likely to see the most significant effect:

TikTok: Used by ~74% of UK teens aged 13–17, making it highly exposed to restrictions on younger cohorts

Snapchat: Particularly strong among younger teens, often acting as a primary communication platform

YouTube: Near-universal usage among children (c.88%), though some usage may persist via non-social or logged-out viewing

Meta platforms (Instagram, Facebook) will also be impacted, though their younger demo skew is typically less concentrated than TikTok or Snapchat.

Overall, platforms with high engagement from early teens, particularly Snap and TikTok, are likely to see the most meaningful reduction in reachable audience in the immediate future.

Looking longer-term, if the policy does what it’s designed to do and reduces time spent on social media platforms by under 16s, will this mean they’ll be less likely to use it as they grow into adulthood? Could we see adult audiences shrink on social media in 10 years' time? Will parents stop using Snap and TikTok too? 

Who knows at this point. But we’ll let you know when we do. What we do know right now, it how this has played out in Australia so far.

What We Can Learn From Australia

Australia introduced a similar under-16 social media restriction in December 2025, making it the first country to implement a nationwide age ban across major platforms including TikTok, Instagram, Snapchat, YouTube, Facebook, X and Reddit. 

Six months on, early data suggests a mixed and still evolving impact.

Initial Platform Impact

Platforms removed or blocked ~4.7 million under-16 accounts shortly after launch.

Compliance has been technically achievable, but not fully consistent, with regulators investigating several platforms for gaps in enforcement.

For advertisers, this shows that large-scale reductions in under-16 addressability can happen quickly once legislation is enforced.

Ongoing Access & Circumvention

However, limiting access has proven more difficult in practice:

61% of under-16s reported little or no change in usage after the ban 

Around 78% are still accessing online platforms in some form 

Many users are bypassing controls via alternative accounts, VPNs or other apps (UK Gov has since said it may investigate banning VPNs too)

This highlights a key limitation: reach may reduce on paper faster than actual behaviour changes. For marketers, this suggests audience fragmentation may increase, rather than simply disappear.

Key Takeaways For The UK

Australia’s experience points to a few clear implications:

Addressable inventory drops quickly, even if usage persists

Age verification is difficult to enforce at scale, creating inconsistencies

Audience behaviour shifts, rather than stops, often towards harder-to-reach environments

Emerging and alternative platforms benefit, increasing fragmentation

Bottom Line?

Australia shows that while regulation can materially reduce formal access and targeting capability, it doesn’t immediately eliminate younger audiences from digital ecosystems.

For UK advertisers, the likely outcome is a reduction in measurable, targetable under-16 audiences on mainstream platforms, alongside a more fragmented and less visible consumption landscape overall.