Accelerated settlements: T+1 in the UK – Q1 2026 key findings

UK readiness for T+1 is advancing, but execution risk remains. Engagement has increased sharply since Q3 2025, making the UK the most advanced market in the study, yet important parts of the operating model still remain underdeveloped.

How prepared is the UK market in practice? Where are firms still relying on future delivery, external readiness and milestones that have yet to be secured?

These key findings draw on input from more than 600 financial services professionals globally. The UK findings show how readiness is progressing as the market moves closer to implementation, and where dependencies continue to create pressure across the buy side and wider market structure.

The research, produced in partnership with the UK Accelerated Settlement Taskforce, Euroclear and DTCC, highlights:

• 83% of firms are actively engaged: this is up from 66% in Q3 2025, making the UK the most advanced market in the study

• Only 14% consider themselves compliant or fully prepared

• 57% of buy-side firms have yet to start development work

• 67% do not believe their service provider is ready to support their T+1 transition

• 34% of firms are expected to miss the 2026 market deadline for allocations and confirmations