Cooper will leave her role on July 28, having joined the bank in 2018.
“We must continue to digitally transform our business to keep delivering easily accessible and intuitive products and services. These need to drive better customer outcomes and ensure we remain modern and competitive and achieve our goal to be the easiest bank to deal with,” Cooper said.
“That is why we are streamlining and simplifying aspects of the bank and investing in the futureproofing of our business to be in a strong position long term.”
Cooper said TSB, like all banks, was seeing branch use “rapidly decline.
“TSB has begun evolving its in-person service model to align with customer preferences, which include providing more specialised support in the moments that matter like getting a home loan and developing smarter technology for easy day-to-day banking,” she said.
“We’re committed to continuing to improve on this to better meet customer needs, which is why we are proposing some changes to our branch network.
“Our customers can be assured that we’ll proactively support them with their banking needs throughout any changes.”