We bought our 1 bedroom flat from my BIL a few years ago at a lower than market price, as part of this arrangement my husband waived a part share in his inheritance.
When we had our first child we moved out as we didn't have enough space, so we are currently renting and also renting out our flat. We are now looking to sell it. I understand that we need to pay capital gains on the difference in sale price now, but I thought that was waived if the flat is our prime residence. But now I've heard that it doesn't count as prime residence (even tho it's the only property we own) as we live elsewhere. Is that correct? And if so, how long would one or all of need to live back in the old flat for, in order for it to count as our prime residence? Advice gratefully received!