Capital gains on sale of original residency (buying second property)

Me and my partner are buying a property together as I’m relocating to another area for work. I won’t have enough time to sell my current property before the purchase of the new one, so will sell it afterwards. I’ve lived in the current property for 15 years. Will I incur a capital gains charge by selling my property after the purchase of a new one?

Hi,
If you sell it within 9 months, no.
Thank you.