Tesco has announced that 9,000 jobs are at risk due to an "increasingly competitive and challenging market".


The supermarket said it expected around half of the affected employees could be redeployed to new roles.


Sweeping changes across the business will include a reduction in deli counters, with 90 stores set to lose the service altogether.


In addition to those directly employed by Tesco, the changes will also impact third-party caterers as the company replaces the hot food service in its staff rooms with self-service kitchens.


Jason Tarry, the UK and Ireland chief executive, said: "In our four years of turnaround we've made good progress, but the market is challenging and we need to continually adapt to remain competitive and respond to how customers want to shop."


Additional changes include reduced hours dedicated to both stock control and merchandising.


Head office workers are also facing cuts as the company moves to a "simpler and leaner structure".


However, Tesco denied reports it will overhaul its in-store bakeries, saying that no significant changes are planned this year.