Since this thread started have visited with friends:
Elachi - nice people, good value, good spicy dishes, good quality, no real issues - but food didn’t have a real wow factor either.
Memsaab (in Lordship Lane) - very good value, similar in price to Elachi. Food though we thought at a higher level - some particularly good tender lamb dishes (Rogan Josh and Achari). Busy and a good atmosphere on the Friday we visited. Most definitely worth the bus ride up Lordship Lane.
Babur - as expected quite exceptional food, an amazing choice of different flavours, everything so well spiced and presented. Even pappadoms and chutneys are a cut above the rest. Busy even on a Sunday evening. Discounts are often available on their website or if you are on their mailing list. Even though more expensive it is excellent value.
Ghurkas, Saka Maka and Himalayan Kingdom still on my to do list.