BT is continuing its US invasion, with the acquisition of American company International Network Services for around £100 million.

INS' services include information risk management and infrastructure transformation, and consulting on business productivity and on enterprise architecture and governance. INS will become a wholly owned subsidiary of BT, part of its Global Services division, as a result of the acquisition, adding 900 staff to the 7,000 already working in BT's global professional services units.

INS CEO David Butze, will report jointly to Chuck Pol, president of BT Americas, and to Gary Bullard, president of BT Global Business and Services. The deal should be complete in a few weeks. INS' last audited accounts, in September 2005, reported gross assets of $49.7 million.

In October, BT bought US security consultancy Counterpane. for a price it said was in the "tens of millions of dollars." Counterpane, with a staff of 75, monitors and protects the networks of around 550 companies.