Just make sure you have sufficient evidence of cohabitation. You should submit the app as soon as possible but if you choose to do so later that’s fine too. Whatever you choose. Just make sure you maintain legal status. The process is very long so I would just submit it given you have enough documentation demonstrating a common law relationship exists.One more question for anyone who see this.
Since in December we have 12 months common law. Should we apply in December or put in the application earlier as it takes long to process?