Grant of Options

31 March 2008

                                  Corero Plc                                   

                                (the "Company")                                

                               Grant of Options                                

The Company announces that Bernard Snowe, Executive Director, Mark Robertson,
Executive Director, and Peter Waller, non-executive Chairman, have been granted
share options over 1,000,000, 1,000,000 and 500,000 ordinary shares,
respectively. 

 

The options have been granted under the rules of the Company's Enterprise
Management Incentive scheme and have an exercise price of 10p.

The options will vest if any of the following conditions are satisfied before
31 December 2009;

  * the mid-market price of the Company's ordinary shares is greater than 30
    pence for a continuous 30 day period;
   
  * the entire issued share capital of the Company was acquired at a price of
    greater than 30 pence per ordinary share.
   
In the event that the entire issued share capital was acquired for less than 30
pence per share prior to 31 December 2009 the options would vest as follows;

  * at 20 pence per share 50 per cent. of the options will vest;
   
  * at between 20 and 30 pence per share between 50 and 100 per cent. of the
    options will vest on a pro rata basis.
   
Following the grant of the above options Mr Snowe, Mr Robertson, and Mr Waller
now hold share options over a total of 1,551,492, 1,488,992 and
575,276 ordinary shares, representing 3.40, 3.27 and 1.26 per cent. of the
current issued share capital of the Company, respectively. Details of which are
as follows;

Mr Snowe

  No. of Options               Exercise Period                Exercise Price   
                                                                               
                                                             (pence per share) 
                                                                               
            40,000        27 April 2002 until 26 April 2011                32.5
                                                                               
             7,500    15 October 2002 until 14 October 2011                17.5
                                                                               
            15,000    30 January 2003 until 29 January 2012                27.5
                                                                               
            50,000    7 February 2006 until 6 February 2015                16.5
                                                                               
           145,829        27 April 2007 until 26 April 2016                18.5
                                                                               
            30,000  19 December 2001 until 18 December 2010                40.0
                                                                               
           263,163        20 April 2008 until 19 April 2017                18.5
                                                                               
         1,000,000      Until 31 December 2009 (as detailed                10.0
                                                     above)                    

Mr Robertson

  No. of Options               Exercise Period                Exercise Price   
                                                                               
                                                             (pence per share) 
                                                                               
           200,000        27 April 2007 until 26 April 2016                18.5
                                                                               
           288,992        20 April 2008 until 19 April 2017                18.5
                                                                               
         1,000,000      Until 31 December 2009 (as detailed                10.0
                                                     above)                    

Mr Waller

  No. of Options               Exercise Period                Exercise Price   
                                                                               
                                                             (pence per share) 
                                                                               
            75,276        27 April 2007 until 26 April 2016                18.5
                                                                               
           500,000      Until 31 December 2009 (as detailed                10.0
                                                     above)                    

ENQUIRIES:

Corero plc                                                                     
                                                                               
Peter Waller                                                  Tel: [phone]
                                                                               
John East & Partners Limited                                                   
                                                                               
John East / Simon Clements                                   Tel: [phone]
                                                                               
College Hill                                                                   
                                                                               
Matthew Smallwood                                            Tel: [phone]