May 23 (Reuters) - Tata Motors Ltd:
* Exec says "hope favourable GST impact and good monsoon will support commercial vehicle sales in fiscal 2018"
* Exec says export and defence related businesses to remain key focus areas in 2017/18
* Exec says JLR's planning target is to achieve 8-10 percent EBIT margin in medium term
* Exec says new JLR models expected to drive solid growth in FY 18 and beyond Further company coverage: