Holding(s) in Company

Mondas PLC
18 November 2005



                                                               18 November, 2005

                                   MONDAS PLC
                          ('Mondas' or 'the Company')

                              Notifiable Interest


Mondas was notified on 16 November, 2005 that following sales of 64,000 ordinary
shares in Mondas in aggregate on 15 and 16 November 2005, Tim Simon is now
interested in the following ordinary shares registered in the following names:-

2,474,200                                 David T A Simon

  458,250                                 Ms Geraldine M Simon

       10                                 Mrs Geraldine Mary Simon

1,520,999                                 Rock (Nominees) Limited

The aggregate of these interests is 4,453,459 shares, equivalent to 15.78
per cent. of the ordinary share capital of the Company.


Further Enquiries:

Mondas plc                                                    Tel: [phone]

Ian Selby


                      This information is provided by RNS
            The company news service from the London Stock Exchange