A Barclays spokeswoman said it was looking into the possibility of redeploying IT staff in other areas of the business, and that it was working closely with the banking union Unifi.
The tie-up with L&G comes six months after Computer Weekly revealed Barclay's radical three-year plan to double its profits by transforming its business processes and IT strategy through large-scale outsourcing.
L&G said the Barclays tie-up would give a significant boost to its Web-enabled financial services, particularly its stakeholder pension products.
Margaret Smith, director of business technology and delivery for L&G, said the main challenge would be integrating its own IT systems with those of Barclays, in a bid to provide customers with seamless services over the Web.
"We need to make sure that we can scale our IT systems," she said. "I hope we won't need extra IT staff but it will make their jobs more exciting."
An early priority for L&G IT staff will be to connect to Barclays' back-office systems as well as developing Web site links to market stakeholder pensions, said Smith.
She added that although L&G did not anticipate recruiting extra IT staff to support the Barclays products it would discuss any areas of IT skills shortages with Barclays staff.