Applicants granted discretionary leave before 9 July 2012 are able to extend their visa permission under the Rules in place at the time they were granted their initial discretionary visa.
Successful extension applications will be granted for 3 years and the individual will be able to apply for indefinite leave to remain once they have completed 6 years with this status (3 plus 3 years).
You can apply for Indefinite Leave to Remain (ILR) upon completion of 6 years under the Discretionary Leave (initial 3 years + 3 years extension). An application for ILR under 6 years route of Discretionary Leave is made either using application form SET (O) or FLR (DL). Those who previously claimed asylum in the UK before they were granted discretionary leave for 3 years should use the application form FLR (DL) and all others should use the application form SET (O) to apply for ILR under the 6 years route of Discretionary Leave.