Carphone Warehouse is to close all of its 531 standalone stores on 3 April, resulting in 2,900 redundancies.
The mobile phone retailer said the closures come as a result of the changing mobile market rather than the impact of the coronavirus outbreak.
The company said the shops, which make up 8% of the entire selling space will shut and plans to sell products solely from its 305 combined Currys PC World stores and online across the UK.
The group’s 70 Carphone Warehouse stores in Ireland will remain open and its international operations are unaffected.
“There’s never an easy time for an announcement like this, but the turbulent times ahead only underline the importance of acting now,” said Alex Baldock, chief executive at Carphone Warehouse.
“We’re working hard to look after those colleagues we cant find new roles for, financially and otherwise.”