There is something different about the appearance of the BT Tower and it's not the count down to the Olympics. The satellite dishes have gone. The skinny bit in the middle used to be covered in giant dishes. Now that fibre optics has replaced the older microwave technology the dishes were redundant and because of their age a potential danger in falling. During last year they have gradually been removed. The last one coming down in December. A nicer looking tower now don't you think? See
here for more information on the removal of the dishes.