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The clock’s ticking. The UK has set October 11, 2027 as the hard date for moving to a T+1 securities settlement cycle, and a big chunk of the market isn’t ready — not even close.
The idea behind T+1 is pretty straightforward: securities transactions settle one day after the trade date instead of two. Faster. Cleaner. Less counterparty risk sitting in the system overnight. Regulators and industry bodies have pushed for it across major markets for years, and the UK is now locked in with a firm deadline. But wanting a faster settlement cycle and actually building the operational infrastructure to support one are two very different things. Right now, the gap between those two realities is wide, and the Financial Conduct Authority knows it.
Buy-Side Firms Falling Behind
Some firms are basically done. They’ve made the system changes, started testing, and are working through the final details. Good for them. But others — particularly on the buy side — haven’t even started the core implementation work yet. That’s not a minor delay. That’s a structural problem.
The UK Accelerated Settlement Taskforce, known as the AST, has laid out clear recommendations. Participants are expected to hit key milestones by December 2026, which is already less than 18 months away. Yet the Value Exchange survey from Q1 2026 found that many buy-side firms still hadn’t kicked off their implementation efforts. No project plans. No timelines. No real movement.
The AST sent a Dear CCO letter spelling out what’s expected. Firms received it. Many apparently read it and then didn’t act on it fast enough. The FCA is watching, and it’s not happy about the pace.
Buy-side firms are under specific scrutiny right now. The FCA is focused on their progress and has made clear it may take further action if readiness doesn’t improve. What that action looks like, exactly, isn’t spelled out yet. But the message is plain: catch up or face consequences.
Third-Party Providers Are a Weak Link
Here’s where it gets messier. A lot of firms can’t finalize their own transition plans because their third-party providers haven’t given them the information they need. No detailed roadmaps. No firm deadlines. Just vague reassurances that something is coming.
The AST expected providers to have already shared their transition strategies with clients. Many haven’t. So firms are stuck — they know they need to move, but they’re waiting on vendors who haven’t delivered the specifics required to actually move.
The FCA has said it will follow up directly on this. The authority wants third-party providers to communicate operational changes and deadlines to their clients. It’s not optional. The FCA’s supervisory approach is getting more intrusive as the deadline gets closer, and third-party providers are now squarely in the frame.
Associations including AFME — the Association for Financial Markets in Europe — UK Finance, and the IA have put out joint industry guidance to help. The guidance covers practical things like using place of settlement (PSET) and place of safekeeping (PSAF) to sharpen operational efficiency. Firms are encouraged to use it. Whether they actually do is another matter.
Settlement performance data from Euroclear UK and International, known as EUI, is expected soon. Once that data lands, the FCA plans to use it to identify firms with poor settlement performance. Those firms will need to disclose what’s causing the inefficiencies and lay out steps to fix them. It’s essentially a public accountability mechanism baked into the supervisory process.
What the FCA Expects Before 2027
The FCA’s strategy has two main pillars right now: communication and market monitoring. Firms are being told to engage actively with clients, counterparties, and third-party providers to make sure the entire settlement chain is prepared — not just their own internal systems.
And it’s not just about the back office. Funds need to think about their own settlement cycles too. The FCA is encouraging firms to align fund settlement cycles to T+2 to avoid creating mismatches with the general securities settlement cycle once T+1 kicks in. A mismatch there could create real friction at exactly the wrong moment.
The FCA keeps stressing collaboration. Firms that treat this as an internal IT project and ignore the chain around them are probably going to hit problems they didn’t see coming. The settlement chain is only as fast as its slowest participant, and right now there are some very slow participants.
Some firms report they still don’t have finalized project plans. That’s a significant risk — not just for those individual firms, but for broader market stability if enough of them stumble at once. The FCA has been explicit: incomplete planning at this stage isn’t just a firm-level concern, it’s a systemic one.
The AST’s guidance and the FCA’s oversight are both aimed at closing the readiness gap before it becomes a crisis. But the Q1 2026 survey data makes it clear the gap is real and it’s wide. Firms that haven’t started need to start now. Firms that have started need to move faster. And third-party providers need to actually deliver the transition plans their clients are waiting on.
EUI settlement performance data is coming. When it does, the firms with poor numbers will have to explain themselves to the FCA.
Frequently Asked Questions
What is the UK’s T+1 settlement deadline?
The UK plans to shift to a T+1 securities settlement cycle on October 11, 2027, requiring securities transactions to settle one day after the trade date rather than two.
Which firms are most at risk of missing the T+1 deadline?
Buy-side firms are under the most scrutiny, with the Value Exchange Q1 2026 survey finding many had not yet begun implementation work; the FCA has said it may take further action if their readiness doesn’t improve.
