I found this useful bit of code :

Run the following script changing the xxx for the database name, run against master.

SELECT 'dbcc dbreindex(''xxxxxxx.DBO.' +name+ ''')'

FROM sysobjects WHERE xtype='U'

This...

Thanks for the reply guys,

GilaMonster - I think you gave me the perfect direction to investigate in, I can see all the information I need to identify the user/process...