U.K. T+1 Settlement on October 11, 2027: What U.S. Firms Should Expect
Updated October 2026, after the U.K. set its T+1 date. First published February 2024.
The U.K. moves to T+1 settlement on Monday, October 11, 2027. When this post first ran in February 2024, the Accelerated Settlement Taskforce hadn't picked a date, and some in the industry expected 2026 at the earliest. The date now rests on three public steps: the Taskforce's Technical Group chose it in February 2025, HM Treasury accepted it that month, and the Treasury published draft legislation on November 20, 2025. The FCA's T+1 page, last updated August 13, 2026, expects firms to be able to test their changes by the end of 2026.
Here's where the date comes from, the deadlines the U.K. has set, and what they mean for a U.S. firm that trades or settles U.K. securities.
Where the Date Comes From
The Taskforce's March 2024 report recommended T+1 no later than the end of 2027 and left the date to a Technical Group. That group's February 2025 report named October 11, 2027 and set out a U.K. T+1 Code of Conduct with 12 critical actions and 26 highly recommended ones. In its response of February 19, 2025, the government said "firms should now begin preparations for 11 October 2027 to be the first day of trading under a T+1 standard" and committed to legislate.
The draft statutory instrument, the Central Securities Depositories (Amendment) (Intended Settlement Date) Regulations 2026, amends Article 5(2) of U.K. CSDR so that trades on U.K. trading venues settle no later than the first business day after trading. It exempts securities lending and borrowing, repos, and buy-sell backs. Technical comments closed on February 27, 2026. The final regulations hadn't appeared on legislation.gov.uk as of October 26, 2026; the Treasury has said it will lay them before the go-live date. The FCA treats the date as fixed and says it may act if firms aren't ready.
The Deadlines in the U.K. Code
London is five hours ahead of New York for most of the year, including on October 11, 2027.
| Step | U.K. deadline | New York time |
|---|---|---|
| Allocations and confirmations, done electronically to a recognized industry standard (critical action SETT 01) | 23:59 on trade date | 6:59 p.m. on trade date |
| Settlement instructions submitted to the CSD (SETT 02) | 05:59 on T+1 | 12:59 a.m. on T+1 |
| CREST input on trade date, extended for T+1 | Until 21:00 | Until 4:00 p.m. |
| Standing settlement instructions shared under the FMSB standard (STAT 01) | In place by December 31, 2026 | |
| Next-day securities lending recalls (SFT 02) | Deadline aligned with the close of trading on the London Stock Exchange | |
The allocation deadline is the one U.S. desks will feel. It's two hours earlier than the 9:00 p.m. ET affirmation cutoff they already work to for U.S. trades. A U.S. manager that trades London stock in its own morning has the afternoon to allocate. One that allocates in an end-of-day batch at 6:00 p.m. New York time has an hour.
What U.S. Firms Should Expect
Your London Brokers and Custodians Will Set Earlier Cutoffs
The Code says allocation and confirmation must also beat "any deadline set by any relevant intermediary," so expect the firms you trade and settle through in London to ask for your allocations well before 23:59. The Code also wants this in place by December 31, 2026, more than nine months before go-live. The FCA's August 2026 blog said roughly half the firms it spoke to already allocate and confirm by the end of trade date. It also cited a Value Exchange survey in which two-thirds of firms didn't think their service providers were ready yet, and it singled out buy-side readiness as a concern.
You'll Need Sterling on T+1
Spot FX normally settles two days after trade date, so a U.S. buyer of U.K. shares faces the same funding problem non-U.S. funds met in May 2024 when they bought U.S. stock. Our post on fund managers and T+1 covers the options, including the CLS deadline.
The Go-Live Week Has Two Quirks
Trades from Friday, October 8 (on T+2) and Monday, October 11 (on T+1) both settle on Tuesday, October 12, which the Technical Group plans for as a "double settlement day." And October 11, 2027 is Columbus Day, a Federal Reserve holiday. Plan dollar funding and U.S. staffing for that Monday and Tuesday now.
Testing Starts Well Before Go-Live
The FCA expects firms to be able to test their changes by the end of 2026, against the U.K. and EU joint testing plan published in March 2026. The EU and Switzerland move on the same day; our post on the European moves covers them.
Two instrument types work differently. Gilts already settle on T+1. The Technical Group recommended that Eurobonds traded on U.K. venues and settled at Euroclear Bank or Clearstream keep following the EU cycle, which moves to T+1 the same day.
This post is for informational purposes only and does not constitute legal advice. For guidance on specific regulatory obligations, consult your counsel or compliance advisor.