The UK's largest insurance company, Aviva, is cutting more than 2,300 call-centre and office jobs and moving them to India to save costs.
The majority of the jobs lost will be back-office IT and administration roles.
The company, which owns the giant Norwich Union brand, made £850m in pre-tax profits in the first half of this year.
Aviva Chief executive Richard Harvey said the move would help Aviva stay competitive and "secure a long-term future for our business and the majority of our people".
Dave Fleming of Amicus said: "This ignores Aviva's corporate responsibility to its UK employees and customers. It will have a serious effect on many local communities for the sake of a saving that won't be passed on to customers."