I'm sure, as a british you'll find a 737 job in India. Air India Express, SpiceJet, Jet Airways are all expanding like hell with 737's, even more airlines in the pipeline.
One problem: Legally you cannot leave the airline without 6 month prior notice, which is quite a long time if you don't like it. State puts that law into place after lot of crews jumping on and off and negative effects on the customer side.
As far as I know, pay isn't very good, but will definitely have to increase within the next few years, regarding the pilot shortage they already have!
NB. Can't imagine myself living in India, it's a bit a difference, so think twice!