Results of CULS Offer

6 August 2010

                                  Corero PLC                                   

                          ("Corero" or "the Company")                          

                             Results of CULS Offer                             

On 14 July 2010 Corero made the offer to redeem £2 million of the Company's
Convertible Unsecured Loan Stock on the basis of £1 nominal of 8% Rivington
Stock and £0.0638905 Zero Coupon Rivington Stock for every £1 nominal of CULS.

As at 1.00 p.m. on 5 August 2010, valid acceptances of the CULS Offer had been
received in respect of a total of £1,976,200 nominal of CULS representing, in
aggregate, 49.41 per cent. of Corero's current issued Convertible Unsecured
Loan Stock. As previously announced, the CULS Offer is only for half of the
total current issued CULS and, therefore, the £1,976,200 nominal of Convertible
Loan Stock which accepted equates to 98.81 per cent. of the CULS which were
available to accept the CULS Offer.

Prior to the posting of the Shareholder circular dated 14 July 2010, Corero had
received irrevocable undertakings from certain CULS Holders to accept the CULS
Offer in respect of, in aggregate, £1,833,816 nominal of CULS representing
approximately 91.7 per cent. of the £2 million nominal of CULS which could
accept the CULS Offer. Corero has received valid acceptances with respect to
all of these irrevocable undertakings.

The CULS Offer, which remains subject to the terms and conditions set out in
the Shareholder circular, is being extended and remains open for acceptance
until further notice. The conditions of the CULS Offer are (i) the passing at
the General Meeting of Resolution numbered 2 and (ii) the completion of the
Disposal pursuant to the Business Transfer Agreement.

CULS Holders who hold CULS in uncertificated form (that is, in CREST) and wish
to accept the Offer, should submit a TTE Instruction and comply with the
instructions in paragraph 6 of Part III of the Shareholder circular as soon as
possible.

Terms defined in the Shareholder circular dated 14 July 2010 have the same
meaning in this announcement.

Enquiries:

Corero plc                                                                   
                                                                             
Peter Waller, Chairman                                     Tel: [phone]
                                                                             
Merchant Securities Limited (Nominated Adviser and Broker)                   
                                                                             
John East / Simon Clements                                 Tel: [phone]
                                                                             
finnCap Limited (Placing Agent)                                              
                                                                             
Tom Jenkins / Sarah Wharry                                 Tel: [phone]
                                                                             
College Hill                                                                 
                                                                             
Matthew Smallwood/Adrian Duffield                          Tel: [phone]