Option 1. You may apply by registered post for an extension shortly before leave expires. It's possible to vary (not withdraw) this application to ILR when you are eligible, if it's still undecided.
Option 2. You may apply by registered post for an ILR shortly before leave expires. If you are eligible on the date of the decision, then you should be ok.Applications wrote:A person who varies their application does not have to pay an additional fee unless the new ground they want to be considered under has a higher fee than their original application. In this case, they must pay the difference between the original fee and the new higher fee.
This means a valid variation will look like a new application. You must check CID to see if an earlier application exists. This will tell you whether the specified form is a variation of an existing application.