Firstly, most younger people do not buy property, they simply rent. Secondly, you share with more people. In the article they reference a single bedroom flat at

Firstly, most younger people do not buy property, they simply rent. Secondly, you share with more people. In the article they reference a single bedroom flat at min £1000 a month which is about right. But that's the most expensive way to live. I share with 3 others and on average we pay about 500 each. This is for a nice enough flat in zone 2 (zone 1 is generally for the very wealthy).