Why has Santander Changed CEO Before TSB Takeover?

Santander UK has announced the appointment of Nicola Bannister as the new CEO of TSB Bank, following Santander’s acquisition of TSB Banking Group from Banco Sabadell.

Santander UK’s acquisition of TSB Bank was first announced on 1 July 2025, with Santander and TSB’s parent company, Banco Sabadell, agreeing to a £2.65bn (US$3.54bn) all-cash transaction for 100% control of TSB.

Nicola will succeed current TSB CEO Marc Armengol, who will be joining Banco Sabadell Group as CEO following the completion of the acquisition. 

Nicola joined TSB in 2022 and has been a member of the TSB Executive Committee since 2024. In addition, she supervised the business transition for TSB since the proposed acquisition in July 2025.

Previously, Nicola worked for Lloyds Banking Group where she acted as Collections Effectiveness Director and Network Director for the Lloyds and Bank of Scotland branch network.

With more than 25 years’ experience in financial services, Nicola has extensive knowledge of insurance, investments, retail and business banking. 

She says: "It's an incredible honour to be invited to become Chief Executive of this amazing bank, particularly as we join forces with Santander UK—with the prospect of offering even better banking for customers in the UK.”

Inside the TSB acquisition

The combination of both franchises is expected to deliver additional shareholder value through increased in-market scale and greater access to low-risk mortgages and deposits.

The acquisition is expected to generate a 20% return on invested capital and will produce cost synergies of 13% of the combined business’s cost base.

To deliver these targets, Santander expects to incur £520m (US$695m) of pre-tax restructuring costs from 2026 to 2027.

Discussing the acquisition, Ana Botín, Executive Chair of Banco Santander, says: "The acquisition of TSB represents a continuing strategic commitment to our customers in the UK, offering a compelling opportunity that is financially attractive to our shareholders [...]

"We are creating a stronger and more competitive business across key products such as personal current accounts where the combined business will become the third largest bank in the UK by market share.”

Improved technologies and service

The TSB acquisition is part of Santander’s strategic commitment to provide its customer base with improved services, such as integrated technologies across both banking platforms and providing a more streamlined digital banking system.

With Santander UK and TSB combined, the two banks would serve nearly 28 million retail and business customers nationwide, becoming the third largest bank for personal account share and the fourth largest for mortgage lending.

The acquisition will allow TSB customers to access Santander’s international network and allow them to benefit from Santander services such as the company’s recent digital banking platform, Gravity.

Commenting on Santander’s customer service investment, Mike Regnier, CEO of Santander UK, adds: “At Santander UK we have momentum in our strategy to become the best bank for customers in the UK by investing in technology and service and improving our processes and efficiency.

“This deal accelerates our transformation allowing us to enhance our customer proposition and invest more in innovative products and our digital offering, supported by the human touch service so many appreciate, not least in our new branch formats and enhancements across the country.”