LONDON (AP) _ BAE Systems PLC will cut 3,800 of its more than 100,000 jobs in Britain as a result of its merger with Marconi Electronics last year, the aerospace company announced Thursday.

``There are a number of areas in the UK in which the company has overlapping production capabilities, duplication of facilities and research and opportunities to improve efficiency and consolidate activities,'' chief executive John Weston said.

British Aerospace acquired Marconi Electronics from Britain's General Electric Co. PLC for 7.7 billion pounds ($11.6 billion) last year, making it the world's third-largest defense and aerospace group. The merged company took the name BAE Systems.

Union leaders said they were surprised by the scale of job losses.

``We are extremely disappointed at the scale of job losses and will be discussing with the company to make sure the cuts are voluntary,'' said Sir Ken Jackson, general secretary of the Amalgamated Engineering and Electrical Union.