CULS cancellation timetable

15 July 2010

                                  Corero PLC                                   

                          ("Corero" or "the Company")                          

                          CULS cancellation timetable                          

Further to the announcement made on 14 July 2010, the Company confirms that the
date of cancellation of the admission of the CULS to trading on AIM,
conditional upon both Admission and approval of the CULS Resolution to be put
to CULS Holders at the CULS Meeting to be held on 6 August 2010, will be 12
August 2010. Accordingly, subject to the conditions being satisfied the last
day of trading in the CULS on AIM will be 11 August 2010.

All other times and dates for the CULS Offer and CULS Compromise, as set out in
the announcement dated 14 July 2010 and the circular to Shareholders and CULS
Holders dated 14 July 2010, remain unchanged. In particular, CULS Holders
should note that the latest time and date for receipt of the Forms of
Acceptance and TTE instructions in respect of the CULS Offer is 1.00 p.m. on 5
August 2010 and the expected date of admission of the CULS Compromise Shares to
trading on AIM is 9 August 2010.

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

Enquiries:

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