My god! Do you take everything so literally? What I am saying is that those people mentioning radar performance at those levels are wrong, it works just fine. Problem is, the controller isnt there to tell you to avoid towers, he is there to help aeroplanes land at heathrow. That means if you start to stray near his approach paths you will be told. That photo shows the crane to be VERY near the river. Under high workload (you are when single pilot at night in the lanes), it wouldnt take much to stray a little for ANY of us here, no matter how experienced.
PS. 32sqn and many many others fly 109