5  Conclusion

January 2026

This research set out to explore the feasibility of a specialist Security Trustee service for the UK social investment market. It sought to test the assumption that no impact-focused alternative to large commercial providers exists, and to determine if there is sufficient market demand to justify creating one. The findings confirm the initial hypothesis: there is currently no dedicated, impact-aligned Security Trustee operating in the UK market. However, the research reveals a nuanced picture regarding the demand for a solution.

5.1 The central tension

The central tension identified by this research is that while the current lack of a specialist provider is a significant “pain point,” it is rarely a “deal-breaker”.

  • For Investors: Security Trustee services are viewed as an “insurance policy”-—a necessary cost that they hope never to use. While commercial providers are often criticized for being expensive, passive, or “paralyzed with indecision” during defaults, established investors are largely resigned to using them or managing the risk internally. Consequently, while a specialist service is widely regarded as “nice to have,” there is no overwhelming commercial imperative from investors to drive its creation immediately.
  • For Investees: The impact is more acute. High fees from commercial providers can actively alter deal structures, forcing them to seek lenders who will forego security to keep projects viable.

5.2 Mechanical vs relational role

A critical finding is the gap between the legal role of a Security Trustee and the desired role. Legally, the role is administrative and mechanical. However, in distress scenarios, the sector desires a “diplomat” or “convener” who can mediate between conflicting investor interests and balance financial recovery with social impact. If the market genuinely moves away from syndicated deals toward sole-lender or unitranche models to avoid complexity, the demand for a standalone Security Trustee may soften. However, it is an open question as to whether this is an artefact of the lack of sector support for syndicated deals, thus constraining social investment capital, or an inevitable consequence of sector maturity.

5.3 Recommendations

While the research suggests that establishing a standalone, for-profit specialist security trustee service may struggle for commercial viability due to low deal volumes and small transaction sizes, there are clear, actionable steps the sector can take to mitigate current risks:

  1. Standardised impact documentation: A significant source of friction is “defective” or generic legal templates that do not account for social impact. The sector should collaborate to develop open-source or standard clauses for security agreements that explicitly define how impact should be weighed against financial recovery in default scenarios.
  2. Capacity building and education: Many market participants admit to a lack of understanding regarding the trustee’s role until a default occurs. Guidance notes and sector training, perhaps via the SIIG, would help align expectations and ensure security arrangements are considered earlier in the deal structuring process.

5.4 Final word

There is a clear gap in the market infrastructure: the current “mechanical” commercial model does not serve the nuanced needs of social investment. However, the solution is likely not a new, standalone business entity, which would struggle with the “feast or famine” nature of the work. That is not to say that no solution is possible, just that it would need additional creativity to avoid this problem.