Holding(s) in Company

30 March 2010

                                  Corero Plc                                   

                          ("Corero" or the "Company")                          

                              Holding in Company                               

The Company announces that Peter Waller, Executive Chairman of the Company,
yesterday purchased 5,000 ordinary shares in the capital of Corero,
representing 0.33 per cent of the voting share capital of the Company, at a
price of 38 pence per share.

Following the purchase, Mr Waller holds a total of 20,600 ordinary shares,
equivalent to 1.36 per cent of the voting share capital of the Company.

Enquiries:

Corero plc                                                                     
Peter Waller, Executive Chairman                             Tel: [phone]
Duncan Swallow, Financial Controller                                           
                                                                               
Merchant John East Securities Limited                                          
John East/Virginia Bull                                      Tel: [phone]