Weekly Briefing: OpenAI Withdraws from UK Deal, VCT Outlook for 2025/26, Aviation Assets & Housing Trends

This week’s stories reflect a balance between ambition and constraint across the UK economy and global markets. From stalled AI infrastructure plans to changing incentives in venture capital, the underlying theme is one of recalibration.

We also see capital finding alternative routes - notably in aviation finance - while the UK housing market offers a more immediate read on economic sentiment.

Read on for the full context.

AI ambitions meet economic reality

Plans to position the UK as a global AI infrastructure hub have encountered a significant setback, with OpenAI pausing its involvement in the Stargate UK project. The initiative, initially framed as a cornerstone of the UK-US AI partnership, was intended to underpin “sovereign compute” - domestic infrastructure capable of supporting sensitive data and advanced AI systems.

However, the project’s foundations now appear much less certain. Investigations revealed that key elements, including a flagship supercomputer site in Essex, remain undeveloped despite earlier projections targeting completion by 2026. This gap between announcement and execution has raised broader questions about the credibility of large-scale AI investment commitments.

At the core of the delay are structural challenges. High industrial electricity costs - the highest in Europe - have worsened amid geopolitical tensions, while regulatory uncertainty continues to complicate long-term infrastructure planning. These factors have combined to weaken the UK’s attractiveness as a destination for energy-intensive data centres.

Demand for large-scale AI compute remains less defined than initially assumed, while competition within the sector is intensifying. At the same time, delivery partners face practical constraints, including limited expertise and resource availability, further slowing progress.

Taken together, the situation, unsurprisingly, highlights a broad disconnect between political ambition and operational feasibility. While the narrative around AI-led growth remains strong, execution now appears contingent on resolving cost, demand, and regulatory barriers.

As one industry figure put it: “OpenAI halting their flagship British investment is a stark warning: Britain is becoming too expensive to build in.”

VCT fundraising rises before policy change

Venture Capital Trusts recorded a modest increase in fundraising for the 2025/26 tax year, reaching £918m according to the Association of Investment Companies. This represents a 3% rise on the previous year and marks the third-highest total on record, suggesting continued investor appetite under existing incentives.

However, this headline figure likely masks a more complex underlying trend we discussed post Autumn Budget. A portion of this capital appears to have been brought forward ahead of a reduction in income tax relief from 30% to 20%, effectively accelerating investment decisions into the previous tax year.

This policy shift is expected to have tangible consequences - by altering the risk-reward balance for investors, the reduced relief may very well dampen future inflows.

The importance of VCTs within the broader ecosystem is undoubtedly clear. Since their introduction in 1994, they have channelled over £12bn into UK businesses, supporting innovation, job creation, and growth across multiple sectors driving economic growth. This makes any sustained decline in fundraising a potential concern for the wider economy and long-term outlook. There is growing uncertainty over whether current fundraising levels can be maintained, particularly if investor sentiment weakens in response to reduced incentives.

As noted by the AIC: “The cut in income tax relief from 30% to 20% shifts the risk/reward calculation for investors and ultimately that will mean growth capital drying up for some of the UK’s most promising companies.”

Aviation capital scales through asset strategy

While some sectors face constraint, others are seeing capital deployed with greater clarity. A new global aviation investment programme, Equator, has been launched with a target of deploying approximately $1.6bn annually into aircraft leased to commercial airlines.

The strategy is built around tangible, income-generating assets. By focusing on aircraft leasing, the programme aims to combine predictable cash flows with long-term asset value, offering investors exposure to global aviation demand without direct operational risk.

Dubai Aerospace Enterprise (DAE) plays a central role, sourcing aircraft and managing assets through its existing platform. With a fleet of around 700 aircraft and established relationships across airlines and manufacturers, DAE brings both scale and operational expertise to the partnership.

The involvement of large institutional capital providers adds further weight to the initiative, with over $100bn under management in related strategies, the investment platform backing Equator is positioned to deploy capital flexibly across market cycles, supporting both investment-grade and higher-yield opportunities.

This approach reflects a broader trend towards asset-backed investing, particularly in an environment where macro uncertainty is elevated. Compared to the challenges outlined in earlier sections - such as infrastructure costs or policy shifts - aviation leasing offers a clearer pathway to returns anchored in physical assets, recurring revenue and global demand.

As one executive involved noted: “This program underscores a focus on deploying flexible capital into high-quality investments backed by hard assets.”

Housing market slows under rate pressure

The UK housing market showed signs of renewed softness in March, with Halifax reporting a 0.5% monthly decline in average house prices, bringing the typical property value to £299,677. This follows a brief period of recovery earlier in the year, suggesting that momentum has already begun to fade.

Rising mortgage rates appear to be a key factor. The average two-year fixed rate climbed to 5.9% in early April, up from 4.83% just a month earlier, reflecting broader financial market reactions to geopolitical developments, particularly in the Middle East.

This increase is now feeding through into buyer behaviour. While many households remain on fixed-rate deals - delaying the full impact - affordability constraints are starting to weigh on demand, particularly in more expensive regions such as London and the South East, both of which recorded annual declines.

Regional divergence still remains a notable feature, while southern markets soften, areas such as Northern Ireland continue to see strong growth, highlighting continued uneven economic conditions across the UK. If borrowing costs remain elevated, were likely to see these gaps widen or maintain at the very least.

We’ve noticed some inconsistencies and differences between data sources. Halifax’s figures contrast with Nationwide’s reported increase for March, though methodological differences - including sample size and regional weighting - often explain short-term discrepancies. Over time, these trends typically converge.

As one economist summarised: “The sharp rise in mortgage rates and the weaker economic outlook… implies house price growth will remain soft this year.”

Final note

Across these stories, a consistent pattern emerges: ambition is increasingly being filtered through the realities of cost, policy, and global uncertainty. Whether in AI infrastructure, venture funding, or housing, the direction of travel is less about expansion at pace and more about selective, measured progress.

For the housing market, the outlook remains closely tied to external factors. As highlighted earlier in the AI section, energy costs and geopolitical tensions are influencing multiple parts of the economy, including mortgage pricing and household confidence.

At the same time, capital is not retreating - it is reallocating. As seen in aviation finance, investors continue to pursue opportunities where structures are clearer and risks more contained. The coming months will likely hinge on whether broader conditions stabilise enough to unlock the next phases of investment.