UK M&A deals of the week: 22 August 2025

UK M&A deals of the week: 22 August 2025

UK M&A activity spanned semiconductors, fintech, property, advisory, and aerospace. Five key transactions defined this week, led by Haylo Labs’ security-approved purchase of Plessey, alongside Starling’s acquisition of Ember and Leonard Curtis’s stake sale to Pollen Street Capital, highlighting national-interest sectors and private capital momentum.








This week’s M&A slate underscores how national interest, regulatory shifts, and private capital are converging to shape deal flow. Haylo Labs’ acquisition of Plessey, cleared on security grounds, illustrates both the UK’s reliance on foreign finance and its determination to retain domestic control in strategic technologies. Meanwhile, Pursuit Aerospace’s integration of Aeromet reflects a parallel story in industrial manufacturing: consolidation as a path to resilience in critical supply chains.

At the same time, service-sector transactions are gaining momentum. Leonard Curtis’s stake sale to Pollen Street exemplifies private equity’s push into professional services, while Starling’s move on Ember highlights fintech’s role in adapting SMEs to mandatory digital compliance. In property, Legal & General’s merger with Federated Hermes points to the enduring appeal of scale as a buffer against structural headwinds.

Across these diverse sectors, the common denominator is a sharpened focus on capability — whether technical, financial, or operational — as acquirers position for both opportunity and protection in a volatile environment.

  • National security still shapes outcomes. Haylo Labs’ purchase of Plessey demonstrates that critical technology assets can pass scrutiny when long-term domestic investment is part of the plan.
  • Private capital is moving deeper into services. Pollen Street’s Leonard Curtis deal and Starling’s Ember acquisition show investors betting on advisory and fintech platforms with structural tailwinds.
  • Scale and integration remain defensive themes. L&G’s property fund merger and Pursuit Aerospace’s Aeromet buy point to consolidation as the preferred strategy for navigating market uncertainty.

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