Director/PDMR Shareholding

Byotrol PLC
21 February 2007




                    Byotrol Plc ('Byotrol' or 'the Company')

                            Directors' Shareholdings



The Board of Byotrol announces that it has granted the following options to
Directors of the Company:


1. 225,000 options exercisable at 78.5p per share pursuant to the Byotrol
   Unapproved Share Option Scheme, to the Chief Executive, David McRobbie.

2. 100,000 options exercisable at 78.5p per share pursuant to the Byotrol
   Unapproved Share Option Scheme and 125,000 options exercisable at 78.5p per
   share pursuant to the Byotrol EMI Share Option Scheme, to the Deputy 
   Chairman,Stephen Falder.

3. 50,000 options exercisable at 78.5p per share pursuant to the Byotrol
   Unapproved Share Option Scheme, to the Finance Director, Richard Bell.


All options were granted by the remuneration committee on 20 February 2007. All
options are exercisable at any time between 21 February 2009 and 20 February
2017 subject to the closing mid-market share price of Byotrol being not less
than £1.80 each business day for a consecutive period of three months.



Following the grant of these options, the directors have the following
interests:

                      Number of Options  Total Number of Shares % of issued share            Existing  % of issued share
                                Granted            Under Option           capital        shareholding            capital

David McRobbie                  225,000                 225,000             0.52%           3,647,614              8.40%
Stephen Falder                  225,000                 225,000             0.52%           4,787,757             11.03%
Richard Bell                     50,000                  50,000             0.12%              10,000              0.02%




Enquiries:

Byotrol plc                        0161 277 9518
Richard Bell   Finance Director    07825 204110


Charles Stanley Securities         020 7149 6457
Philip Davies / Anthony Noakes





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