How about Silverjet starting routes from LTN to Delhi and/or Bombay?
I've flown LHR-DEL numerous times. Business and First class always seem to have high load factors. With the rapid growth in the Indian economy there is very strong demand from Indian business and leisure travellers for premium seats between London and Indian destinations, as well as from the UK ethnic Indian community.
Here's one more who would be interested in a Silverjet service to DEL if it were ever to materialize.