Update... Applied on 15 january and still waiting !
I have received all my documents ( indefinite travel document and all supported documents) back with a letter saying to send urgently my old travel document ( 5 year live to remain) .The letter dated on 18 may and received on 21 may.
The letter specified that the old travel document is needed to prove the residency requirement.
I found this link about residency requirement.I didn't read at this stage of stress
https://www.gov.uk/government/uploads/s ... 141212.pdf
Above 4 month and 1 week now,hope the best for everyone including me!