The closure of SLOTXO all 29 M&S in-store bank branches is another sign of how bricks and mortar banking is falling out of favour, an analyst has said.
All 29 are shutting on Friday, ahead of the withdrawal of M&S Bank from the current account market.
It is a turnaround from the launch of branches in its department stores in 2012 when it promised to provide something different for customers.
But analyst Katie Brain said Covid had compounded issues for branch networks.
The introduction of banking counters in supermarkets and other stores became popular for a few years.
However, with more and more people using smartphones for their banking needs, providers have been reassessing the need for such an extensive High Street presence.
"Consumers most likely to require a branch for their banking needs are those who, for a variety of reasons, are not able to use online or mobile banking; potentially older, more vulnerable customers," said Ms Brain, from data specialists Defaqto.
They would only be served if banks co-ordinated to ensure at least one branch in town remained open, or different banks operated in shared premises, she said.