[toyg]

In the UK, contractors are considered high-risk for mortgages and car loans. Even if you manage to lock-in a mortgage before starting your contractor career, it will make things difficult should you wish to remortgage (which is almost mandatory every 3 to 5 years, these days...).

[mschuster91]

Oh yeah, totally forgot about that one... and in case you end up broke/in debt with contracting, your personal credit score will be screwed up, too.

[justinholmes]

You can get a contractor mortgage based on your day rate in UK.