Acquisition of EM4

For immediate release 25 January 2011

Gooch & Housego PLC (the "Company")

Acquisition of EM4, Inc. ("EM4")

Gooch & Housego PLC, the specialist manufacturer of optical components and systems, today announces that following receipt of regulatory approval (announced on 19 January 2011) it has completed the acquisition of EM4.

For further information, please contact:

Gooch & Housego PLC

Gareth Jones / Andrew Boteler Tel: 01460 256440

Buchanan Communications

Tim Thompson/Chris McMahon Tel: 020 7466 5000

Investec PLC

Patrick Robb Tel: 020 7597 5970