I have a different perspective although what's been said here makes a lot of sense. Prices are so expensive especially in desirable areas, it is so hard for people to afford a house, or to even save enough for a deposit in a decent amount of time. I'm American, so my experience is different, but I thought this young couple are doing a great thing, taking their destiny into their own hands, what we call the American spirit which is in reality the spirit of all countries and we Americans realize that.
This couple decided they would have their own house and they planned and saved and found/researched mechanisms in place like the government program that could help them with their goal. Bravo to them. Be happy for them, is how I feel. They are not putting down single mothers or people who are struggling. Their advice is more towards people who do have extra money to save but blow it and then complain. I don't see them as smug at all. I see their point about growing up in a detached house so they wanted their own place when they were married. Personally I feel every person deserves their own piece of land and a house, if that is their desire. I understand that is not everyone's philosophy and in big crowded cities, especially London, one of the world's most famous and greatest cities, it's not always possible. Not always, but often, where there is a determination, there is a way to reach a goal, even a very big or seemingly impossible goal, I have found. We were able to afford a fixer upper house with a lot of character and a big yard by choosing a pretty established neighborhood a bit further away from the newer and more expensive part of town where we live. There's a lot we all can learn from this young couple. Just a different opinion.