Nov 8 (Reuters) - Ardent Leisure Group AAD.AX :
* Resignation of group CEO and business update
* Resignation of Simon Kelly as group's chief executive officer and managing director.
* Ardent is trading broadly in line with expectations for FY18 core EBITDA
* Geoff Richardson, group's CFO will assume role of interim chief executive officer immediately
* Depreciation charges for FY18 are expected to be about A$10 million higher than prior corresponding period