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Document and Entity Information Document - shares
 12 Months Ended
Jun. 30, 2018
Oct. 10, 2018
Document Information [Line Items]    
Entity Registrant Name Endava plc  
Entity Central Index Key 0001656081  
Entity Filer Category Non-accelerated Filer  
Current Fiscal Year End Date --06-30  
Entity Current Reporting Status Yes  
Entity Well-known Seasoned Issuer No  
Document Type 20-F  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus FY  
Amendment Flag false  
Entity Common Stock, Shares Outstanding 49,804,145  
Class A ordinary shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   11,994,980
Class B ordinary shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   27,257,215
Class C ordinary shares    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   13,780,945