The U.S. - U.K. "special relationship"

The end of the UK – US special relationship has been sounded with an economic crash and a turn of power. Since the 1946 speech by Winston Churchill, the two nations have held exceptionally close political, diplomatic, cultural and historical relations until now. Over the years, the relationship has been maintained by two major powers has been due to the level of cooperation in military planning and execution, as well as the sharing of technology and intelligence at a level that some considered unparallel.
What I found most interesting about the lecture was that the US pays in millions of dollars into the British Intelligence budget. This definitely indicates a trusting bond of some sort as America is investing a lot of money into a British system. In fact the United States is the largest source of foreign direct investment to the British economy; likewise the United Kingdom is the largest single investor in the US economy. This is why the British economy took such a hard hit with the stock market crash in comparison to other major nations. The two not only share the same language or shared history but its economic policies seem to be quite in sync with each other.
While their relationship has been beneficial to both parties in many ways, I still think there is such a thing as being too close. Yes, it is absolutely detrimental to not have any allies during war time as having foreign support has proven to be very useful but where does one draw the line at being too close for comfort. Having such a close relationship drags one into the others problems and that itself can be a recipe for disaster.