Moving to Mumbai in September

Hi, I'm originally from the UK and I have been working in Malaysia for the past 2 years. I am due to arrive in Mumbai in September this year with a view to expand our companies offices throughout the country. I have a british passport and am of Indian origin so I'm applying for my OCI now (which certainly helps!).

It would be useful to find out where the expat communities are so I can plan my journey over, all help is much appreciated.

Many thanks

Raj