DP and I (mid 20s) both work in the city (finance). We work long long hours but enjoy living super centrally. We are fortunate that we could in theory afford to buy a one bedroom apartment near to where we live now, and where we are happy. This would cost £500-600k. Even with the high interest rates, we could afford this. No plans on kids for at least ten years. Obviously our high paid jobs might not be forever, but one of us could afford the mortgage at a stretch if for whatever reason.