Cat-23 · T369 · Capital Markets Settlement · AP2 Export

T+1 Post-Trade Workflow Timing Assessor

Assess whether your firm's post-trade workflow meets T+1 settlement timing requirements mandated by the UK Accelerated Settlement Taskforce (AST) Code of Conduct and the EU T+1 Taskforce. Five-step chain scoring with PASS / FAIL / WARNING, first chain-break identification, per-step remediation actions, jurisdiction pressure scores, and an implementation timeline for Q4 2026 readiness. Deterministic logic — no inference, zero PII.

UK AST Code of Conduct 2025 HM Treasury SI · 11 Oct 2027 ESMA EU T+1 Taskforce CREST · CTM · DTCC Zero PII · Client-Side CC BY 4.0
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Panel 01 Workflow Timing — Post-Trade Chain
AST target: same-session OMS capture. Delays here compress all downstream steps.
UK AST target: by end of T+0. EU ESMA target: by 23:59 CET on T+0.
UK AST: affirmation to broker by 23:00 UK on T+0. Feeds central matching cut-off.
Matched trades must reach CSD by 23:59 T+0. Full automation is essential at T+1 volumes.
CREST target: SIs submitted by 08:00 T+1. Settlement window: 07:00–18:00 T+1. Final settlement: 18:00.
Panel 02 Operational Context
ADRs and cross-border trades carry additional settlement complexity under T+1.
CLS cut-off is 06:30 CET. FX legs may conflict with T+1 CREST timelines for cross-border trades.
T+1 Workflow Readiness Assessment
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Overall Readiness Score
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/ 100 · T+1 Readiness
Step-by-Step Post-Trade Timeline
Time Pressure by Jurisdiction
Remediation Actions — Failing & Warning Steps
Implementation Timeline — Q4 2026 Readiness Target
AP2 v1.0 · @ainumbers.co/t1-post-trade-workflow-timing-assessor-v1

Regulatory Sources

[1]UK Accelerated Settlement Taskforce (AST) Code of Conduct (2025) — T+0 allocation, affirmation by 23:00, and central matching requirements for UK participants.
[2]HM Treasury Statutory Instrument — Accelerated Settlement of Securities Transactions, effective 11 October 2027. Mandates T+1 for UK equities, gilts, and ETFs.
[3]THEIA T+1 Report, January 2026 — Operational readiness requirements and recommended workflow timings across the UK post-trade chain (OMS to CSD).
[4]ESMA T+1 Taskforce — EU alignment to UK October 2027 mandate. Allocation by 23:59 CET T+0; confirmation to CCPs by 23:59 CET T+0.
[5]FCA Dear Compliance Officer Letter, January 2026 — Firms expected to complete T+1 gap analysis by Q3 2026 and be operationally ready by Q1 2027.