TELENT TECHNOLOGY SERVICES LIMITED

Kroll Trustee Services Limited as Security Agent

Lloyds Bank PLC

STANHOPE PENSION TRUST LIMITED AS TRUSTEE OF THE G.E.C.1972 PLAN

CAMBRIDGE CITY COUNCIL

RENT DEPOSIT AGREEMENT

TELENT GMBH

DEBENTURE

LLOYDS TSB BANK PLC

DEPOSIT AGREEMENT TO SECURE OWN LIABILITIES

Lloyds Tsb Bank PLC

All such rights to the repayment of the deposit meaning the debt(s) on the account(s) described in the schedule being the account with the bank denominated in sterling designated ltsb re: telent communications limited and numbered 00500508 and any account(s) for the time being replacing the same and all interest owing in respect thereof and all deposits with the banks treasury division in the name of the bank re the company.

THE LAW DEBENTURE TRUST CORPORATION P.L.C. (THE SECURITY TRUSTEE)

MORTGAGE

THE LAW DEBENTURE TRUST CORPORATION P.L.C. AS SECURITY TRUSTEE

SECURITY OVER SHARES AGREEMENT

ORBIT DEVELOPMENTS (SOUTHERN) LIMITED

RENT DEPOSIT DEED

THE LAW DEBENTURE TRUST CORPORATION P.L.C. (THE SECURITY TRUSTEE)

SECURITY TRUST AND INTERCREDITOR DEED

THE LAW DEBENTURE TRUST CORPORATION P.L.C. AS SECURITY TRUSTEE

AN AUSTRALIAN ASSET FIXED AND FLOATING CHARGE

THE LAW DEBENTURE TRUST CORPORATION P.L.C. AS SECURITY TRUSTEE

A DEBENTURE BETWEEN THE COMPANIES (INCLUDING THE CHARGOR) AND THE LAW DEBENTURE TRUST CORPORATION P.L.C. AS SECURITY TRUSTEE FOR THE SECURED CREDITORS

THE LAW DEBENTURE TRUST CORPORATION PLC (THE SECURITY TRUSTEE)

MORTGAGE

MARCONI CORPORATION PLC

DEBENTURE

MARCONI CORPORATION PLC

SUPPLEMENTAL DEBENTURE

CORPORATE AIRCRAFT LEASING LIMITED

ASSIGNMENT OF INSURANCES