First Day of Dealings

Avacta Group plc (formerly Readybuy plc)                    

                         First Day of Dealings on AIM                          

Avacta Group plc ("the Company") announces the re-admission of its existing
ordinary shares; the admission of 45,000,000 Placing Shares and the admission
of 475,530,102 new Ordinary Shares issued pursuant to the Acquisition Agreement
to trading on AIM today.

A total of 644,857,446 Ordinary Shares were admitted to trading, giving a
market capitalisation for the Company, at the placing price of 2.25p per share,
of £14.5m.

At the Extraordinary General Meeting of the Company held on Monday 7 August,
Daron Lee resigned as a director of the Company; Professor Alastair Smith was
appointed Chief Executive and Dr. Gwyn Humphreys, Dr. Simon Webster, Dr. Kurt
Baldwin, Tim Sykes, Professor Tony Robards OBE and Alan Aubrey were appointed
directors of the Company.

Professor Alastair Smith, Chief Executive, Avacta Group plc, commented:

"I am delighted that this transaction, leading to our listing on AIM, is on
schedule and the funds raised will enable us to focus on the development of our
first products. Our relocation to the York Biocentre has been completed
successfully with a seamless transition of our laboratories and staff.

"Our focus is on delivering multiple revenue streams for shareholders through a
range of products and services designed to identify and rapidly analyse
substances at the molecular level. Such technology will initially be exploited
through applications within the defence, homeland security and
biopharmaceutical markets where the need exists for timely analysis of
chemicals, viruses, bacteria and proteins such as toxins and antibodies.

"We look forward to an exciting year of progress and anticipate regular
newsflow concerning product development and planned collaborative agreements"

                                                                8th August 2006

Enquiries:

Avacta Group plc                              Tel: [phone]               
                                                                               
Alastair Smith, Chief Executive                                                
                                                                               
WH Ireland Limited                            Tel: [phone]               
                                                                               
David Youngman, Director, Corporate Finance                                    
                                                                               
Nexus Financial Ltd                           Tel: [phone]               
                                                                               
Nicholas Nelson, Director                     [e-mail] 

In accordance with Schedule Two(g) of the AIM Rules, the Company is pleased to
provide the information below:-

Director             Age   Current directorships      Previous directorships   
                                                      (last five years)        
                                                                               
Professor David      39    Avacta Limited             Hebden Lodge Hotel       
Alastair Maclaughlin                                  Company Limited          
Smith                      Avacta Analytical Limited                           
                                                                               
                           TT123 Limited                                       
                                                                               
Dr. Simon Webster    38    Avacta Limited             None                     
                                                                               
                           Avacta Analytical Limited                           
                                                                               
Dr. Kurt Justin      38    Avacta Limited             None                     
Baldwin                                                                        
                           Avacta Analytical Limited                           
                                                                               
Dr. Gwynfor Owen     60    Avacta Limited             Bradford Particle Design 
Humphreys                                             Limited                  
                           Elucidos Limited                                    
                                                      Nektar Therapeutics UK   
                           Connect Yorkshire          Limited                  
                                                                               
                           Inside track I LLP                                  
                                                                               
                           Inside track II LLP                                 
                                                                               
                           Syntopix Group plc                                  
                                                                               
                           Syntopix Services Limited                           
                                                                               
                           Syntopix Limited                                    
                                                                               
                           Bioniqs Limited                                     
                                                                               
Professor Anthony    66    Avacta Limited             Bioincubator York Limited
William Robards                                                                
                           Yorkshire Cancer Research  Business Link York and   
                           Limited                    North Yorkshire Limited  
                                                                               
                           York and North Yorkshire   Knowledge Base (UK)      
                                                      Limited                  
                           Inward Investment Board                             
                           Limited                    Yhman Limited            
                                                                               
                           Yorktest Laboratories      Yorkshire Building       
                           Limited                    Society Charitable       
                                                      Foundation               
                           York Science Park                                   
                           (Innovation Centre)        York and North Yorkshire 
                           Limited                    Chamber of Commerce      
                                                                               
                           York Science Park Limited  White Rose Research      
                                                      Limited                  
                           York Professional                                   
                           Initiative                                          
                                                                               
                           Yorktest Group Limited                              
                                                                               
                           Pro-Cure Therapeutics                               
                           Limited                                             
                                                                               
                           Venturefest (York) Limited                          
                                                                               
                           Connect Yorkshire                                   
                                                                               
                           LG01 Limited                                        
                                                                               
                           Elucidos Limited                                    
                                                                               
Alan John Aubrey     45    Aquarius Equity Partners   AXM Venture Capital      
                           Limited                    Limited                  
                                                                               
                           Axiomlab                   Empiricom Technologies   
                                                      Limited                  
                           Axiomlab Limited                                    
                                                      Energetix Group Limited  
                           Axiomlab Group plc                                  
                                                      Flexisols Limited        
                           Axiomlab Investment                                 
                           Management Limited         NWSF Holdings Limited    
                                                                               
                           Axiomlab Investments       Thermetica Limited       
                           Limited                                             
                                                                               
                           Inhoco 2835 Limited                                 
                                                                               
                           Inhoco 2895 Limited                                 
                                                                               
                           IP Group Plc                                        
                                                                               
                           Life UK (IP21PO) Limited                            
                                                                               
                           Modern Biosciences Plc                              
                                                                               
                           PROACTIS Group Limited                              
                                                                               
                           PROACTIS Holdings PLC                               
                                                                               
                           Syntopix Group Plc                                  
                                                                               
                           Syntopix Limited                                    
                                                                               
                           Techtran Corporate Finance                          
                           Limited                                             
                                                                               
                           Techtran Group Limited                              
                                                                               
                           Techtran Investments                                
                           Limited                                             
                                                                               
                           Techtran Limited                                    
                                                                               
                           Techtran Services Limited                           
                                                                               
                           IP2IPO Limited                                      
                                                                               
                           IP2IPO Management Limited                           
                                                                               
                           IP2IPO Management II                                
                           Limited                                             
                                                                               
                           IP Venture Fund (GP)                                
                           Limited                                             
                                                                               
                           IP Ventures (Scotland)                              
                           Limited                                             
                                                                               
                           HATT III General Partner                            
                           Limited                                             
                                                                               
                           Top Technology Ventures                             
                           Limited                                             
                                                                               
                           TTV IV G.P. Limited                                 
                                                                               
Timothy James Sykes  36    Avacta Limited             Mountain Warehouse       
                                                      Limited                  
                           Avacta Analytical Limited                           
                                                      Mountain Warehouse       
                           Penta Financial Direction  Holdings Limited         
                           Limited                                             
                                                                               
                           PROACTIS Group Limited                              
                                                                               
                           PROACTIS Holdings PLC                               

There are no other disclosures required under Schedule Two (g).

All terms used in this announcement are defined as set out in the Admission
Document dated 13 July 2006.